if anyone has the same question:
viewtopic.php?f=140&t=129849&p=548783&hilit=vivek&sid=30570e2fcc7f26350dd66c790e132d89#p548783
-Vivek
Search found 23830 matches
- Mon Mar 18, 2024 6:19 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Vivek Worksheet Week 8
- Replies: 3
- Views: 357
- Mon Mar 18, 2024 6:12 pm
- Forum: Student Social/Study Group
- Topic: chem 14c
- Replies: 1
- Views: 23
Re: chem 14c
Usually many people drop within the first two weeks. Don't give up hope--keep checking when the quarter starts, go to lecture, and I think you would have a good shot at finding a dropped spot.
-VIvek
-VIvek
- Mon Mar 18, 2024 10:51 am
- Forum: Resonance in Organic Compounds
- Topic: CHEM 14C
- Replies: 1
- Views: 15
Re: CHEM 14C
acids and bases
- Sun Mar 17, 2024 7:50 pm
- Forum: Second Order Reactions
- Topic: Question 10 Achieve HW
- Replies: 4
- Views: 25
Re: Question 10 Achieve HW
Contact Achieve support. They are assisting real-time.
- Sun Mar 17, 2024 7:26 pm
- Forum: General Science Questions
- Topic: number of posts
- Replies: 4
- Views: 24
Re: number of posts
Make sure to read:
Weekly Online Discussion (Chemistry Community)
https://lavelle.chem.ucla.edu/wp-conten ... ussion.pdf
Weekly Online Discussion (Chemistry Community)
https://lavelle.chem.ucla.edu/wp-conten ... ussion.pdf
- Sun Mar 17, 2024 7:23 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Achieve Technical Error
- Replies: 6
- Views: 38
- Sun Mar 17, 2024 5:38 pm
- Forum: General Science Questions
- Topic: number of posts
- Replies: 4
- Views: 24
Re: number of posts
Click on your username and count how many posts made this quarter as all your posts are listed.
Need minimum 20 questions and 20 answers as stated online.
Need minimum 20 questions and 20 answers as stated online.
- Sun Mar 17, 2024 5:14 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Achieve Technical Error
- Replies: 6
- Views: 38
Re: Achieve Technical Error
This is very strange.
Ask Achieve technical support to contact me.
They also need to explain why a different browser does not work.
Ask Achieve technical support to contact me.
They also need to explain why a different browser does not work.
- Sun Mar 17, 2024 10:24 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Electrochemistry Review Sat Mar 16th 3-4pm slides
- Replies: 1
- Views: 511
Re: Electrochemistry Review Sat Mar 16th 3-4pm slides
Great!
Well done!
Well done!
- Sun Mar 17, 2024 10:22 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Final Review Session (Sat. Mar 16) Zoom Recording
- Replies: 2
- Views: 148
Re: Final Review Session (Sat. Mar 16) Zoom Recording
Another helpful review.
:-)
:-)
- Sun Mar 17, 2024 10:21 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Acids and Bases Review Natalie Keung
- Replies: 1
- Views: 75
Re: Acids and Bases Review Natalie Keung
Useful review.
:-)
:-)
- Sun Mar 17, 2024 10:17 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Sam's Notes
- Replies: 1
- Views: 136
Re: Sam's Notes
Popular notes.
:-)
:-)
- Sat Mar 16, 2024 10:04 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Electrochemistry Review Sat Mar 16th 3-4pm slides
- Replies: 1
- Views: 511
Electrochemistry Review Sat Mar 16th 3-4pm slides
Hi everyone, I've attached the electrochemistry slides below for anyone who wants to review (also have a minor correction in there):
- Sat Mar 16, 2024 8:49 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Achieve Technical Error
- Replies: 6
- Views: 38
Re: Achieve Technical Error
Use a different browser.
Achieve support is another option.
Achieve support is another option.
- Sat Mar 16, 2024 8:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: C in 14B?
- Replies: 1
- Views: 30
Re: C in 14B?
UCLA grade scale or better.
- Sat Mar 16, 2024 7:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Answer Keys for Midterms
- Replies: 1
- Views: 19
Re: Answer Keys for Midterms
Students could ask how to do a problem in TA office hours and on Chemistry Community all quarter.
- Sat Mar 16, 2024 6:52 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
- Replies: 6
- Views: 744
Re: Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
305961049 wrote:Probably a dumb question but for number 10, why is n=2... I think this could be my sleepy brain, but someone help!
You’re good haha super valid question! n is based on the electrons transferred in our redox. We see that 2e- are transferred in the reduction and oxidation, so n = 2.
- Patrick
- Sat Mar 16, 2024 4:41 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Final Review Session (Sat. Mar 16) Zoom Recording
- Replies: 2
- Views: 148
Final Review Session (Sat. Mar 16) Zoom Recording
Here is the Zoom recording from today's final review session! Topics covered are Thermodynamics, Kinetics, Chemical Equilibria, and Acids & Bases. Apologies for the first few minutes getting cut off, it was just a brief example/explanation of microstates and introduced the Boltzmann equation as ...
- Sat Mar 16, 2024 4:19 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Shrinidhy's Week 10 Workshop/Final Review Topic is endorsed
- Replies: 9
- Views: 634
Re: Shrinidhy's Week 10 Workshop/Final Review Topic is endorsed
Hi everyone! Apologies for the delay but an answer key to this week's session can now be found attached here. Again, feel free to email me at shrinidhy02@ucla.edu if you have any questions. Good luck on your final tomorrow, y'all will do great!
-Shrinidhy
-Shrinidhy
- Sat Mar 16, 2024 3:27 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Chem14B - Winter 2024 Itzel's Discussion Sections 2J, 2K, 2L
- Replies: 9
- Views: 1168
Re: Chem14B - Winter 2024 Itzel's Discussion Sections 2J, 2K, 2L
Kinetic Slides (continued)
- Sat Mar 16, 2024 10:17 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Nikta's Week 9 workshop (option of joining through zoom)
- Replies: 3
- Views: 223
Re: Nikta's Week 9 workshop (option of joining through zoom)
I would show the work because it is a free response test and you get points for showing your work.
- Sat Mar 16, 2024 10:16 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Nikta's Week 8 workshop (Answer Key Posted)
- Replies: 6
- Views: 314
Re: Nikta's Week 8 workshop (Answer Key Posted)
For this question, I first wrote the general formula E=Ecell-(0.0542/n) x logQ, then since it was at equilibrium and we know E=0, I wrote Ecell=(0.0592/n) x logK and derived the expression for solving K. Hopefully that helps
- Sat Mar 16, 2024 7:08 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Vivek Week 8 wksht #4 [ENDORSED]
- Replies: 2
- Views: 23
Re: Vivek Week 8 wksht #4 [ENDORSED]
You can, but its just a difference in how the formula is understood. If you do the flip, -1.68, becomes 1.68, and then you do Ecathode + Eanode = -1.18 + (1.68) = 0.5 You could also just not do the flip, only the difference is the formula would be Ecathode - Eanode = -1.18 -(-1.68) = 0.5; which is ...
- Fri Mar 15, 2024 2:44 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Jaden's Workshop Week 10 - Thermal Equilibrium and Acid/Bases (Key Posted) Topic is endorsed
- Replies: 3
- Views: 360
Re: Jaden's Workshop Week 10 - Thermal Equilibrium and Acid/Bases Topic is endorsed
I have a question about question 4: Screenshot 2024-03-14 085842.png From my understanding, knowing that all the acids have very large Ka and are strong, we only need to calculate the equilibrium constant of acid dissociation Ka = -log(pKa). But I was just wondering why how the pKa can help rank th...
- Fri Mar 15, 2024 11:45 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Acids and Bases Review Natalie Keung
- Replies: 1
- Views: 75
Acids and Bases Review Natalie Keung
Hey guys, see you soon at my review session! Here are the notes:
- Fri Mar 15, 2024 11:40 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's W9 Step-Up Session - Kinetics
- Replies: 4
- Views: 366
Re: Patrick's W9 Step-Up Session - Kinetics
I just realized I made a small booboo in the answer key -- For the part where you fill in the chart, the equations for the 2nd order reaction are incorrect. Please refer to your equation sheet to figure out which one applies :)
- Fri Mar 15, 2024 11:38 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
- Replies: 6
- Views: 744
Re: Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
For the last question, how come the partial pressure of H2 is not taken into consideration for the expression for Q. In other problems I have seen PH2 being used in the Nerst equation as part of the expression for the reaction quotient. This is a great question! The reason we don't account for the ...
- Fri Mar 15, 2024 9:56 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Isabella's Step-Up Session Week 10 - Electrochemistry Review
- Replies: 1
- Views: 211
Isabella's Step-Up Session Week 10 - Electrochemistry Review
Hi everyone!
I hope y'all are doing well! We will be going over the W10 WS on Electrochemistry Review. I will be posting the answer key after each session. Hope to see you all at the session!
(Here is the link: https://ucla.zoom.us/j/99341875539?pwd= ... RrYm1OQT09)
Best,
Isabella
I hope y'all are doing well! We will be going over the W10 WS on Electrochemistry Review. I will be posting the answer key after each session. Hope to see you all at the session!
(Here is the link: https://ucla.zoom.us/j/99341875539?pwd= ... RrYm1OQT09)
Best,
Isabella
- Fri Mar 15, 2024 6:05 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Where Arrhenius Equation Comes From? [ENDORSED]
- Replies: 1
- Views: 38
Re: Where Arrhenius Equation Comes From? [ENDORSED]
The Arrhenius equation was obtained by analyzing data from experiments on the kinetics of chemical reactions.
It is therefore an empirical equation based on experimental data and was not derived.
Hence I did not derive it in class.
It is therefore an empirical equation based on experimental data and was not derived.
Hence I did not derive it in class.
- Fri Mar 15, 2024 1:06 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Nikta's Week 10 workshop [Answer key posted]
- Replies: 2
- Views: 412
Re: Nikta's Week 10 workshop - Option of Joining through zoom
Here is the answer key! Best of luck on your Final!
- Thu Mar 14, 2024 4:01 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Ashley Chem14B Electrochem/Kinetics Review
- Replies: 1
- Views: 160
Ashley Chem14B Electrochem/Kinetics Review
hi good luck on the final! here's some practice problems :))
- Thu Mar 14, 2024 2:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: TA Kinetics Review Session Topic is endorsed
- Replies: 1
- Views: 58
Re: TA Kinetics Review Session Topic is endorsed
They are a combination of Q&A with concepts needed to answer questions.
- Thu Mar 14, 2024 12:33 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
- Replies: 6
- Views: 744
Re: Patrick's GENERAL FINAL REVIEW Step-Up Session (QUESTIONS POSTED!) Topic is endorsed
As promised, here is the answer key! Great job to everyone who came in person today, especially to those who stayed the whole time either standing or sitting on the floor. If you weren't able to make it, definitely check out the answer key and ask if you have any questions. Good luck on the final an...
- Thu Mar 14, 2024 10:33 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Emerald's Week 10 Step-Up
- Replies: 1
- Views: 67
Re: Emerald's Week 10 Step-Up
Here it is!
- Thu Mar 14, 2024 10:32 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Emerald's Week 10 Step-Up
- Replies: 1
- Views: 67
Emerald's Week 10 Step-Up
Hey guys! Thank you so much for attending my last step-up session! In preparation for your final, I am posting my completed worksheet as a reply to this post. It includes some questions we didn't get a chance to go over, but feel free to email me if you have any questions. Good luck on Sunday!
- Thu Mar 14, 2024 5:14 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Isabella's Step-Up Session Week 9
- Replies: 1
- Views: 94
Re: Isabella's Step-Up Session Week 9
Useful. Thanks
- Thu Mar 14, 2024 5:12 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Ashley Chem14B Week 9 Workshop
- Replies: 1
- Views: 84
Re: Ashley Chem14B Week 9 Workshop
Useful. Thanks
- Thu Mar 14, 2024 1:55 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
- Replies: 6
- Views: 744
Re: Patrick's GENERAL FINAL REVIEW Step-Up Session (QUESTIONS POSTED!)) Topic is endorsed
The worksheet is done! Yes, it's 16 pages. No, it's not 16 pages of questions. Again, while the questions will cover concepts from all over CHEM 14B, you will need to do additional reviewing to make sure you understand all concepts. I tried putting everything useful onto one document (including clas...
- Wed Mar 13, 2024 11:05 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Sam's Notes
- Replies: 1
- Views: 136
Sam's Notes
Hi all,
Here are my lecture notes from Chem 14B. I hope they can be useful as you review for the final!
Feel free to contact me by email, social media, or anything else convenient if you have Chemistry questions as you're studying (:
Here are my lecture notes from Chem 14B. I hope they can be useful as you review for the final!
Feel free to contact me by email, social media, or anything else convenient if you have Chemistry questions as you're studying (:
- Wed Mar 13, 2024 10:45 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Sam's Workshop Week 10
- Replies: 4
- Views: 255
Re: Sam's Workshop Week 10
Here is the answer key
- Wed Mar 13, 2024 9:00 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Adila's Final Review Topic is endorsed
- Replies: 3
- Views: 411
Re: Adila's Final Review Topic is endorsed
Here's the answer key!
- Wed Mar 13, 2024 4:59 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Kaethe's Week 10 Thermo
- Replies: 1
- Views: 182
Re: Kaethe's Week 10 Thermo
Here is the answer key! Thank you to everyone for coming!
- Wed Mar 13, 2024 11:38 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Slow Step Intermediate Concentration [ENDORSED]
- Replies: 1
- Views: 30
Re: Slow Step Intermediate Concentration [ENDORSED]
Yes
Do what I did in the class.
Treat the first step at equilibrium and use it to obtain an expression for the intermediate concentration.
Then substitute out the intermediate concentration in the rate law for the slow step.
Do what I did in the class.
Treat the first step at equilibrium and use it to obtain an expression for the intermediate concentration.
Then substitute out the intermediate concentration in the rate law for the slow step.
- Wed Mar 13, 2024 11:32 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: CHEmistry community
- Replies: 1
- Views: 60
Re: CHEmistry community
I will make an announcement on this.
- Wed Mar 13, 2024 11:28 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: FINAL Topic is endorsed
- Replies: 1
- Views: 166
Re: FINAL Topic is endorsed
Please read what was already announced on Bruin Learn under the module "Final". "The final reflects the Syllabus. Sections are not weighted more or less. For example, electrochemistry and kinetics are 4 weeks." I have commented on this multiple times (Chemistry Community, Bruin L...
- Wed Mar 13, 2024 11:20 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Nikta's Week 10 workshop [Answer key posted]
- Replies: 2
- Views: 412
Nikta's Week 10 workshop [Answer key posted]
Hello everyone! I've attached my worksheet and review sheet which I will go through today. My sessions are on Wednesdays from 7-9 pm in Covel Southbay on the hill (It is located on the third floor in Covel Commons) Due to large number of people attending today's session and not enough room, I decide...
- Wed Mar 13, 2024 11:11 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Nikta's Week 8 workshop (Answer Key Posted)
- Replies: 6
- Views: 314
Re: Nikta's Week 8 workshop (Answer Key Posted)
Hello! The reason you got a slightly different answer is because 10^69 is a very large number and when you input it in the calculator, it rounds it differently. As long as you say 10^69, it is enough and the slight variation doesn't matter.
- Wed Mar 13, 2024 11:05 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Gabriel Nitro's Workshop FINAL REVIEW KINETICS- Week 10 (W24)
- Replies: 4
- Views: 483
Re: Gabriel Nitro's Workshop FINAL REVIEW KINETICS- Week 10 (W24)
Here is the key!
Cheers,
Gabriel
Cheers,
Gabriel
- Wed Mar 13, 2024 6:39 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: n value [ENDORSED]
- Replies: 1
- Views: 25
Re: n value [ENDORSED]
n is the moles of electrons in the balanced redox reaction.
You can watch my lecture where I discuss this.
You can watch my lecture where I discuss this.
- Tue Mar 12, 2024 10:27 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Can missed Chemistry Community posts be made up?
- Replies: 2
- Views: 40
Re: Can missed Chemistry Community posts be made up?
Since they were done the very next day they will be counted.
- Tue Mar 12, 2024 10:24 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Amount of questions on final
- Replies: 2
- Views: 58
Re: Amount of questions on final
Correct. Double time. Double points.
Midterm 1 was 12 questions. Double would be 24 questions.
It will be less than 24 questions.
I keep answering questions on Chemistry Community every day and need more time to work on the final.
If I knew how many questions I would say so.
Midterm 1 was 12 questions. Double would be 24 questions.
It will be less than 24 questions.
I keep answering questions on Chemistry Community every day and need more time to work on the final.
If I knew how many questions I would say so.
- Tue Mar 12, 2024 10:20 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Margaret's Week 10 Step-Up: Kinetics
- Replies: 2
- Views: 268
Re: Margaret's Week 10 Step-Up: Kinetics
Here is the key! Once again, thank you so much everyone for a great quarter. Seeing the same people every week made me incredibly happy :) Wishing everyone luck on the final! You'll all do great! Feel free to reach out if you guys ever need college/premed advice or want to keep in touch! Email is ma...
- Tue Mar 12, 2024 9:55 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Kaethe's Week 10 Thermo
- Replies: 1
- Views: 182
Kaethe's Week 10 Thermo
Here is the WS I'll go over tomorrow 4-5 on zoom!
- Tue Mar 12, 2024 8:50 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: michaelis [ENDORSED]
- Replies: 1
- Views: 35
Re: michaelis [ENDORSED]
Enzyme kinetics (Michaelis Menten kinetics) is not part of the Syllabus.
Please see my Kinetics outline:
https://lavelle.chem.ucla.edu/wp-conten ... netics.pdf
Please see my Kinetics outline:
https://lavelle.chem.ucla.edu/wp-conten ... netics.pdf
- Tue Mar 12, 2024 7:07 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Jaden's Workshop Week 10 - Thermal Equilibrium and Acid/Bases (Key Posted) Topic is endorsed
- Replies: 3
- Views: 360
Jaden's Workshop Week 10 - Thermal Equilibrium and Acid/Bases (Key Posted) Topic is endorsed
Hi everyone, Thank you for the wonderful two quarters that I've spent with you or one if you didn't have Dr. Lavelle for 14A. I hope I was able to make you laugh a little, study more effectively, and most importantly, understand chemistry more. Some of y'all I will see around campus, some of you I w...
- Tue Mar 12, 2024 6:01 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's W9 Step-Up Session - Kinetics
- Replies: 4
- Views: 366
Re: Patrick's W9 Step-Up Session - Kinetics
So sorry for the delay! Here you go :)
- Tue Mar 12, 2024 10:56 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Sam's Workshop Week 10
- Replies: 4
- Views: 255
Re: Sam's Workshop Week 10
Notes for thermo because it’s the hardest unit
- Tue Mar 12, 2024 4:08 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Margaret's Week 10 Step-Up: Kinetics
- Replies: 2
- Views: 268
Margaret's Week 10 Step-Up: Kinetics
Hey everyone, I wasn't feeling super well last week so I'm covering my week 9 kinetics worksheet this week! My step-ups will be 4-5pm and 5-6pm like normal. I can't believe two quarters have passed so quickly and I'm extremely grateful to everyone who's been able to make it to my sessions. We're alm...
- Mon Mar 11, 2024 10:06 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Shrinidhy's Week 10 Workshop/Final Review Topic is endorsed
- Replies: 9
- Views: 634
Shrinidhy's Week 10 Workshop/Final Review Topic is endorsed
Hi everyone! My final/Week 10 review will be hosted tomorrow, March 12, from 9:00AM - 11:00AM in YH 4232. We'll be working through problems and I'll answer any questions that anyone has. No pressure to come in having worked these problems out, we'll go through them together. As always, if you have a...
- Mon Mar 11, 2024 9:14 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Vivek Worksheet Week 10 Topic is endorsed
- Replies: 1
- Views: 209
Re: Vivek Worksheet Week 10 Topic is endorsed
A clarification for today's session: We don't include pure solids when applying Le Chatlier's Principle. In our session today, I said we only worry about aqueous, gas, and solid phases but not liquid. This is incorrect--we only worry about aqueous and gas, but not solids or liquids. Thanks to everyo...
- Mon Mar 11, 2024 6:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final exam Topic is endorsed
- Replies: 2
- Views: 629
Re: Final exam Topic is endorsed
Please read what was already announced on Bruin Learn under the module "Final". "The final reflects the Syllabus. Sections are not weighted more or less. For example, electrochemistry and kinetics are 4 weeks." I have commented on this multiple times (Chemistry Community, Bruin L...
- Mon Mar 11, 2024 6:24 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Achieve 6N.13 [ENDORSED]
- Replies: 1
- Views: 62
Re: Achieve 6N.13 [ENDORSED]
Your number is correct. 3.3 x 10 6 is approximately 10 6 . Measuring the difference between 3.3 x 10 6 and 1.0 x 10 6 would be extremely hard to do. Very large equilibrium constants are often given without significant figures. The % difference (error) between 3.3 x 10 6 and 1.0 x 10 6 is extremely s...
- Mon Mar 11, 2024 2:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Content on Final
- Replies: 1
- Views: 65
Re: Content on Final
Please read what was already announced on Bruin Learn under the module "Final". "The final reflects the Syllabus. Sections are not weighted more or less. For example, electrochemistry and kinetics are 4 weeks." I have commented on this multiple times and will discuss it again in ...
- Mon Mar 11, 2024 11:47 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: UA Anamika - Final Review Acid Base/Equilibrium
- Replies: 1
- Views: 159
- Mon Mar 11, 2024 10:19 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Gabriel Week 9 Worksheet Question
- Replies: 2
- Views: 23
Re: Gabriel Week 9 Worksheet Question
Hi, The general concept was relating the differential rate law from the mechanism to the tabulated data. The notation here is to denote that the product of all these constants can be simplified into one constant: k'. It was intended to make it easier to visualize the rate law without three different...
- Mon Mar 11, 2024 9:00 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Gabriel Nitro's Workshop FINAL REVIEW KINETICS- Week 10 (W24)
- Replies: 4
- Views: 483
Gabriel Nitro's Workshop FINAL REVIEW KINETICS- Week 10 (W24)
Hi everyone,
We're at the home stretch!
My final review will focus exclusively on kinetics.
Here is the worksheet.
See you Saturday! =)
Cheers,
Gabriel
We're at the home stretch!
My final review will focus exclusively on kinetics.
Here is the worksheet.
See you Saturday! =)
Cheers,
Gabriel
- Mon Mar 11, 2024 7:17 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Ion-selective electrodes [ENDORSED]
- Replies: 1
- Views: 44
Re: Ion-selective electrodes [ENDORSED]
The different ion concentrations inside the electrode and in the solution create a voltage difference which is measured.
Using the Nernst equation the only unknown is the ion concentration in the solution which is then calculated.
Watch my last lecture on electrochemistry where I discuss this.
Using the Nernst equation the only unknown is the ion concentration in the solution which is then calculated.
Watch my last lecture on electrochemistry where I discuss this.
- Sun Mar 10, 2024 10:39 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
- Replies: 6
- Views: 744
Patrick's GENERAL FINAL REVIEW Step-Up Session (ANSWER KEY POSTED!) Topic is endorsed
Hey everyone! The CHEM 14B Final is here -- you all are nearly done! For this week's step-up session, I'll be making a complete CHEM 14B review worksheet as many of you have requested. I am still working on it, but expect it to be posted Wednesday night by the latest. Do keep in mind that I will not...
- Sun Mar 10, 2024 10:07 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: combining elementary rate laws [ENDORSED]
- Replies: 2
- Views: 41
Re: combining elementary rate laws [ENDORSED]
The question will state, determine the overall rate law from the following proposed mechanism.
The question will give information on which step in the mechanism is the slow step.
I discuss this in class.
The question will give information on which step in the mechanism is the slow step.
I discuss this in class.
- Sun Mar 10, 2024 7:34 pm
- Forum: Biological Examples
- Topic: 7.25 Frog Adaptation [ENDORSED]
- Replies: 2
- Views: 65
Re: 7.25 Frog Adaptation [ENDORSED]
"Vision depends on the protein rhodopsin, which absorbs light in the retina of the eye in a reaction in which one form, metarhodopsin I, is converted to another, metarhodopsin II." In frogs the half-life of this reaction is less temperature dependent which enables frogs to maintain their v...
- Sun Mar 10, 2024 4:31 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Which standard cell potential to use [ENDORSED]
- Replies: 1
- Views: 44
Re: Which standard cell potential to use [ENDORSED]
Use the one that matches the reaction in the question.
Or given two standard-reduction half-reactions in the question, reverse the one that gives the largest positive voltage to determine/predict the redox reaction.
Rewatch my lecture as I discussed this in detail.
Or given two standard-reduction half-reactions in the question, reverse the one that gives the largest positive voltage to determine/predict the redox reaction.
Rewatch my lecture as I discussed this in detail.
- Sun Mar 10, 2024 4:25 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Midterm Standard Cell Potentials
- Replies: 1
- Views: 40
Re: Midterm Standard Cell Potentials
Definitely a table, but both could occur.
- Sun Mar 10, 2024 4:13 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: rate of reaction sign [ENDORSED]
- Replies: 2
- Views: 37
Re: rate of reaction sign [ENDORSED]
It is a convention. Also one focuses typically on the product that is formed and its concentration is increasing (positive). If one relates the change in product concentration to the change in reactant concentration, then need to change the sign for reactant rate: R ---> P -d[R]/dt = d[P]/dt Warning...
- Sun Mar 10, 2024 2:00 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: UA Anamika - Final Review Acid Base/Equilibrium
- Replies: 1
- Views: 159
UA Anamika - Final Review Acid Base/Equilibrium
Hi! Here is my worksheet for my final review step up session on Monday at 10AM on Zoom (not 11). I will be covering acid base and equilibrium free response problems. See you soon! *correction* on number 3 of the problems section, [HA] = 0.096M *correction* on number 7 of the problems section, 60% of...
- Sun Mar 10, 2024 11:41 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Week 9 Step Up: Natalie Keung
- Replies: 1
- Views: 64
Re: Week 9 Step Up: Natalie Keung
Well Done
- Sun Mar 10, 2024 11:38 am
- Forum: Administrative Questions and Class Announcements
- Topic: Spring Chem 14C Lecture 1 Discussions Exchange
- Replies: 1
- Views: 83
Re: Spring Chem 14C Lecture 1 Discussions Exchange
Hopefully this was resolved.
- Sun Mar 10, 2024 11:35 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Inert Electrodes [ENDORSED]
- Replies: 1
- Views: 55
Re: Inert Electrodes [ENDORSED]
When the half reaction does not involve a conducting metal solid.
I will do an example in my Wed review in class.
I will do an example in my Wed review in class.
- Sun Mar 10, 2024 11:28 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Margaret's Week 9 CANCELLED
- Replies: 1
- Views: 61
Re: Margaret's Week 9 CANCELLED
Hope you feel better.
- Sun Mar 10, 2024 11:27 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Shrinidhy's Workshop Week 9 - CANCELLED
- Replies: 1
- Views: 78
Re: Shrinidhy's Workshop Week 9 - CANCELLED
Hope you feel better.
- Sun Mar 10, 2024 6:22 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Vivek Worksheet Week 10 Topic is endorsed
- Replies: 1
- Views: 209
Vivek Worksheet Week 10 Topic is endorsed
The UAs are reviewing different topics this week.
I'll be going over equilibrium and acids/bases this week. Let's finish strong.
-Vivek
I'll be going over equilibrium and acids/bases this week. Let's finish strong.
-Vivek
- Sat Mar 09, 2024 11:51 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Sam's Workshop Week 10
- Replies: 4
- Views: 255
Re: Sam's Workshop Week 10
Worksheet pdf
- Sat Mar 09, 2024 11:50 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Sam's Workshop Week 10
- Replies: 4
- Views: 255
Sam's Workshop Week 10
Hi all,
This week my workshop will be focused on covering the rest of kinetics. I'm not running a dedicated general review session, but you're obviously free to bring all your questions on any topics to my sessions, and I'll do my best to answer.
Hope to see you there!
This week my workshop will be focused on covering the rest of kinetics. I'm not running a dedicated general review session, but you're obviously free to bring all your questions on any topics to my sessions, and I'll do my best to answer.
Hope to see you there!
- Sat Mar 09, 2024 11:42 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Gabriel Nitro's Workshop - Week 9 (W24)
- Replies: 6
- Views: 360
Re: Gabriel Nitro's Workshop - Week 9 (W24)
Hi,
Hopefully, it is still in the De Neve Sycamore room. If not, I'll send an announcement on this thread.
Hopefully, it is still in the De Neve Sycamore room. If not, I'll send an announcement on this thread.
- Sat Mar 09, 2024 6:17 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Gabriel Nitro's Workshop - Week 9 (W24)
- Replies: 6
- Views: 360
Re: Gabriel Nitro's Workshop - Week 9 (W24)
Here is the key!
- Sat Mar 09, 2024 12:01 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Gabriel Nitro's Workshop - Week 9 (W24)
- Replies: 6
- Views: 360
Re: Gabriel Nitro's Workshop - Week 9 (W24)
Hi everyone,
Sorry about this but we are in the Magroove room today as someone took our room. I'll be contacting residential life about it.
Here is the zoom link to join for you to see the work: https://ucla.zoom.us/j/97331468794
Sorry about this but we are in the Magroove room today as someone took our room. I'll be contacting residential life about it.
Here is the zoom link to join for you to see the work: https://ucla.zoom.us/j/97331468794
- Sat Mar 09, 2024 10:46 am
- Forum: General Rate Laws
- Topic: Forward vs. Reverse [ENDORSED]
- Replies: 1
- Views: 26
Re: Forward vs. Reverse [ENDORSED]
Don't mix up rates with rate constants.
At equilibrium: rate forward reaction = rate reverse reaction
With respect to rate constants, the ratio of the rate constants is equal to the equilibrium constant:
k(forward)/k(reverse) = K
At equilibrium: rate forward reaction = rate reverse reaction
With respect to rate constants, the ratio of the rate constants is equal to the equilibrium constant:
k(forward)/k(reverse) = K
- Sat Mar 09, 2024 10:39 am
- Forum: *Enzyme Kinetics
- Topic: Michaelis-Menten [ENDORSED]
- Replies: 1
- Views: 39
Re: Michaelis-Menten [ENDORSED]
Great question but Michaelis-Menten enzyme kinetics is not part of the syllabus.
If it is discussed, then students may mistakenly think it is part of the final exam next weekend.
See Kinetics Outline: https://lavelle.chem.ucla.edu/wp-conten ... netics.pdf
If it is discussed, then students may mistakenly think it is part of the final exam next weekend.
See Kinetics Outline: https://lavelle.chem.ucla.edu/wp-conten ... netics.pdf
- Sat Mar 09, 2024 10:33 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Textbook Error example 7c.1 [ENDORSED]
- Replies: 1
- Views: 63
Re: Textbook Error example 7c.1 [ENDORSED]
Agreed. Good catch on the sign typo, and thank you. Since we are not using the steady-state approximation I won't update the error file as this could mislead students into thinking that the steady-state approximation is part of the syllabus. See Kinetics Outline: https://lavelle.chem.ucla.edu/wp-con...
- Sat Mar 09, 2024 10:01 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Adila's Final Review Topic is endorsed
- Replies: 3
- Views: 411
Adila's Final Review Topic is endorsed
Hey everyone, It's almost finals time so this week's session will be a review session. We will be doing a review worksheet during the session since I covered kinetics last week and I can answer any last-minute questions you have. I am also attaching a comprehensive summary sheet that contains everyt...
- Sat Mar 09, 2024 9:54 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Adila's Week 9 Step Up Session Topic is endorsed
- Replies: 1
- Views: 120
Re: Adila's Week 9 Step Up Session Topic is endorsed
here's the answer key!
- Fri Mar 08, 2024 7:32 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Nikta's Week 9 workshop (option of joining through zoom)
- Replies: 3
- Views: 223
Re: Nikta's Week 9 workshop (option of joining through zoom)
Here is the answer key!
- Fri Mar 08, 2024 7:29 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Memorizing Reduction Potential
- Replies: 1
- Views: 50
Re: Memorizing Reduction Potential
Definitely not expected to memorize any constants.
I will also give all standard reduction half-reactions.
I will also give all standard reduction half-reactions.
- Fri Mar 08, 2024 12:18 pm
- Forum: General Rate Laws
- Topic: Graph of zero-order reaction [ENDORSED]
- Replies: 3
- Views: 20
Re: Graph of zero-order reaction [ENDORSED]
The concentration of reactant must decrease with time. Otherwise, the reaction is at equilibrium.
But the rate at which the reactant concentration changes is not dependent on the reactant concentration, hence zero order.
Hope this clarifies.
But the rate at which the reactant concentration changes is not dependent on the reactant concentration, hence zero order.
Hope this clarifies.
- Fri Mar 08, 2024 9:57 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Isabella's Step-Up Session Week 9
- Replies: 1
- Views: 94
Isabella's Step-Up Session Week 9
Hi everyone!
I hope y'all are doing well! We will be going over the W9 WS on Kinetics. I will be posting the answer key after each session. Hope to see you all at the session!
(Here is the link: https://ucla.zoom.us/j/99341875539?pwd= ... RrYm1OQT09)
Best,
Isabella
I hope y'all are doing well! We will be going over the W9 WS on Kinetics. I will be posting the answer key after each session. Hope to see you all at the session!
(Here is the link: https://ucla.zoom.us/j/99341875539?pwd= ... RrYm1OQT09)
Best,
Isabella
- Fri Mar 08, 2024 8:59 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Chem14B - Winter 2024 Itzel's Discussion Sections 2J, 2K, 2L
- Replies: 9
- Views: 1168
Re: Chem14B - Winter 2024 Itzel's Discussion Sections 2J, 2K, 2L
Kinetics Slides
- Thu Mar 07, 2024 4:07 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Ashley Chem14B Week 9 Workshop
- Replies: 1
- Views: 84
Ashley Chem14B Week 9 Workshop
Kinetics practice!
- Thu Mar 07, 2024 2:28 pm
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Jaden's Workshop Week 8 - Introduction to Electrochemistry
- Replies: 4
- Views: 206
- Thu Mar 07, 2024 10:44 am
- Forum: Zero Order Reactions
- Topic: Determining Zero Order [ENDORSED]
- Replies: 1
- Views: 30
Re: Determining Zero Order [ENDORSED]
On changing the initial reactant concentration there is no change in the initial reaction rate.
Then the rate is independent of that reactant (zero order).
I mentioned this in class yesterday.
Then the rate is independent of that reactant (zero order).
I mentioned this in class yesterday.
- Thu Mar 07, 2024 10:04 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Patrick's W9 Step-Up Session - Kinetics
- Replies: 4
- Views: 366
Patrick's W9 Step-Up Session - Kinetics
Hi everyone,
Here is the worksheet! YH 4232 10-11 and 11-12 as usual.
Here is the worksheet! YH 4232 10-11 and 11-12 as usual.
- Thu Mar 07, 2024 9:58 am
- Forum: Chem 14B Uploaded Files (Worksheets, etc.)
- Topic: Winter 2024 Chem14B - Discussion Sections 2F, 3F, 3K
- Replies: 7
- Views: 566
Re: Winter 2024 Chem14B - Discussion Sections 2F, 3F, 3K
Week 9 slides