Search found 67 matches
- Sun Mar 17, 2019 9:36 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Le Chatlier Principle
- Replies: 10
- Views: 2132
Re: Le Chatlier Principle
A catalyst only affects the reaction rate. Products, reactants, equilibrium constants etc would not change.
- Sun Mar 17, 2019 8:25 pm
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 174075
Re: Chemistry News
https://www.sciencedaily.com/releases/2 ... 100629.htm
Since we've been talking about Catalyst in class, here's an interesting article.
Since we've been talking about Catalyst in class, here's an interesting article.
- Sun Mar 17, 2019 8:23 pm
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 174075
- Sun Mar 17, 2019 8:17 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
How did the hipster chemist burn his hand?
He picked up his beaker before it was cool.
He picked up his beaker before it was cool.
- Sun Mar 17, 2019 8:08 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Why do chemists find working with ammonia easy?
Because it’s pretty basic stuff.
Because it’s pretty basic stuff.
- Sun Mar 17, 2019 8:04 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
I tried writing jokes about the periodic table…
…but I realized I wasn’t quite in my element.
…but I realized I wasn’t quite in my element.
- Sun Mar 17, 2019 8:03 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
https://www.google.com/search?q=chemistry+jokes&rlz=1C1CHZL_enUS737US737&tbm=isch&source=iu&ictx=1&fir=nqu933a92n6OtM%253A%252CnAThXZM2Vmq5BM%252C_&vet=1&usg=AI4_-kT0J-I8CWv_qn2XCfz6O4xx3RMeOA&sa=X&ved=2ahUKEwi1_NHY2YrhAhVoHzQIHRI_DWsQ9QEwBnoECAAQDg#imgrc=jtdNoMy...
- Sun Mar 17, 2019 7:20 pm
- Forum: Van't Hoff Equation
- Topic: Van't Hoff use
- Replies: 13
- Views: 2156
Re: Van't Hoff use
The van 't Hoff equation can be used to explore the changes in state functions in a thermodynamic system
- Sun Mar 17, 2019 7:15 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Effect of increased concentration on equilibrium
- Replies: 9
- Views: 1500
Re: Effect of increased concentration on equilibrium
Think of Le Chatelier's Principle. If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change.
- Sun Mar 17, 2019 7:13 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Material provided in all Chem 14A/14B quizzes and exams
- Replies: 12
- Views: 22718
Re: Material provided in all Chem 14A/14B quizzes and exams
Anything you would want graded must be in pen.
- Sun Mar 17, 2019 7:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Chemistry community posts
- Replies: 5
- Views: 1018
Re: Chemistry community posts
I'm sure it's the same. As long as you have 30 posts by the end of the quarter you should get full points.
- Sun Mar 17, 2019 7:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 453041
Re: Advice from a Medical Student [ENDORSED]
What made you want to go to med school?
- Sun Mar 17, 2019 7:04 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Grade Release Date?
- Replies: 7
- Views: 1010
Re: Final Grade Release Date?
Does anyone know if the answer key to the final will be posted?
- Sun Mar 17, 2019 7:00 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to list Chem_Mod posts
- Replies: 25
- Views: 94150
Re: How to list Chem_Mod posts
Thank you!
- Sun Mar 17, 2019 6:59 pm
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 174075
Re: Chemistry News
https://www.sciencedaily.com/releases/2 ... 084905.htm
Here's some cool crystals that emit light when heated.
Here's some cool crystals that emit light when heated.
- Sun Mar 17, 2019 6:56 pm
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 174075
- Sun Mar 17, 2019 6:52 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 156017
Re: Reading the textbook
I find that looking at the examples in the book really help understand how each concept is applied. Doing the hw problems after covering the concepts also help.
- Sun Mar 17, 2019 6:48 pm
- Forum: Student Social/Study Group
- Topic: Chemistry Community
- Replies: 8
- Views: 1368
Re: Chemistry Community
I believe they just [censored] all your posts at the ended of the quarter. I'm not quite sure how it works though because I realized that I was posting the Chem14A instead of 14B but they seemed to be the same page.
- Sun Mar 17, 2019 6:44 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Lavelle's other classes
- Replies: 3
- Views: 712
Re: Lavelle's other classes
Lavelle doesn't teach 14C?
- Sun Mar 17, 2019 6:35 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Organic chemistry is difficult. Those who study it have alkynes of trouble.
- Sun Mar 17, 2019 6:33 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Making bad chemistry jokes because all the good ones Argon
- Sun Mar 17, 2019 6:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Why do chemists like nitrates so much?
They're cheaper than day rates.
They're cheaper than day rates.
- Sun Mar 17, 2019 6:30 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be 0k?
- Sun Mar 17, 2019 6:24 pm
- Forum: *Enzyme Kinetics
- Topic: Catalysts
- Replies: 8
- Views: 1098
Re: Catalysts
Catalyst should only affect the chemical rate of the reaction. The catalyst itself is not altered nor is the equilibrium. I don't think they affect the reactants or the products.
- Sun Mar 17, 2019 6:21 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: What is pKa and Ka exactly?
- Replies: 16
- Views: 25207
Re: What is pKa and Ka exactly?
The acid dissociation constant, Ka, is a quantitative indicator of the strength of an acid in a solution. pKa is simply the negative log of ka.
- Sun Mar 17, 2019 6:17 pm
- Forum: Van't Hoff Equation
- Topic: Temp Units
- Replies: 11
- Views: 1366
Re: Temp Units
It's in Kelvin.
- Sun Mar 17, 2019 6:14 pm
- Forum: Van't Hoff Equation
- Topic: Temp Units
- Replies: 11
- Views: 1366
Re: Temp Units
It's in Kelvin.
- Sun Dec 09, 2018 9:06 pm
- Forum: General Science Questions
- Topic: Final Grades
- Replies: 2
- Views: 735
Final Grades
I know we just took our final, but I was just curious as to when final grades will be posted.
- Sun Dec 09, 2018 3:42 am
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 7
- Views: 1322
Re: Cisplatin
Will cisplatin be apart of what we need to know on the final?
- Sun Dec 09, 2018 3:37 am
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: strength of base
- Replies: 8
- Views: 854
Re: strength of base
The bond strengths of acids and bases are implied by the relative amounts of molecules and ions present in solution. Strong acids have mostly ions in solution and weak acids exist mostly as molecules with only a few ions in solution.
- Sun Dec 09, 2018 3:33 am
- Forum: Naming
- Topic: Chloro vs Chlorito
- Replies: 10
- Views: 1262
Re: Chloro vs Chlorito
I would go based off of the ones Lavelle has on his website.
- Sun Dec 09, 2018 3:30 am
- Forum: Trends in The Periodic Table
- Topic: 2nd Ionization Energy
- Replies: 2
- Views: 528
2nd Ionization Energy
Will we be test on 2nd Ionization energy? I was working on a problem in Ch 2 (6th edition) and found that none of the 2nd ionization questions was listed on the hw.
- Sun Dec 09, 2018 3:27 am
- Forum: Calculating the pH of Salt Solutions
- Topic: 6th Edition Example 12.10 -12.11
- Replies: 2
- Views: 541
Re: 6th Edition Example 12.10 -12.11
Anything covered in the HW is material the test will cover. So yes.
- Sun Dec 09, 2018 3:25 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: magnetism
- Replies: 1
- Views: 2436
Re: magnetism
According to the Pauli Exclusion Principle which states that no two electrons may occupy the same quantum state at the same time, the electron spins are oriented in opposite directions. This causes the magnetic fields of the electrons to cancel out; thus there is no net magnetic moment, and the atom...
- Sun Dec 09, 2018 3:22 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Outline 6 Box 12.1
- Replies: 2
- Views: 312
Re: Outline 6 Box 12.1
I would practice both just in case.
- Sun Dec 09, 2018 3:20 am
- Forum: Photoelectric Effect
- Topic: Finding frequency
- Replies: 2
- Views: 2474
Re: Finding frequency
E=hv!! So substitute planck's constant for h and set that equation= to work function + Ek
- Sun Dec 09, 2018 3:17 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: bond order
- Replies: 4
- Views: 492
Re: bond order
i believe you do. They form other bonds to achieve stability.
- Sun Dec 09, 2018 3:07 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Elements we have to memorize for the Midterm
- Replies: 4
- Views: 702
Re: Elements we have to memorize for the Midterm
Lavelle always provides a periodic table for exams so I doubt it.
- Sun Dec 09, 2018 3:04 am
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 174075
Re: Chemistry News
Hilda Sauceda 3C wrote:does anyone know is there is gonna be a study guide?
There's a practice final posted somewhere in the chemistry community created by one of the UAs. They said it would closely resemble Lavelle's exam.
- Sun Dec 09, 2018 3:03 am
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 174075
Re: Chemistry News
This article discusses a new battery concept based on fluoride ions that could potentially expand lifespan so we would only have to charge our phones twice a month!!
https://www.sciencedaily.com/releases/2 ... 141209.htm
https://www.sciencedaily.com/releases/2 ... 141209.htm
- Sun Dec 09, 2018 2:59 am
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 174075
- Sun Dec 09, 2018 2:57 am
- Forum: General Science Questions
- Topic: Studying Methods
- Replies: 6
- Views: 1068
Re: Studying Methods
Khan academy is also very helpful!!!
- Sun Dec 09, 2018 2:56 am
- Forum: General Science Questions
- Topic: Studying Methods
- Replies: 6
- Views: 1068
Re: Studying Methods
Khan academy is also very helpful!!!
- Sun Dec 09, 2018 2:54 am
- Forum: Bond Lengths & Energies
- Topic: Bond Length
- Replies: 1
- Views: 468
Re: Bond Length
I think it would be F2^-1, but not quite sure.
- Sun Dec 09, 2018 2:39 am
- Forum: Lewis Acids & Bases
- Topic: SO3 acid or base?
- Replies: 2
- Views: 4129
Re: SO3 acid or base?
SO3 is a non-metal oxide and non-metal oxides are acidic in nature. The aqueous solution of acidic oxides donates protons, therefore SO3 is an acidic oxide
- Sun Dec 09, 2018 2:35 am
- Forum: Lewis Acids & Bases
- Topic: 6th Edition 12.49
- Replies: 2
- Views: 515
Re: 6th Edition 12.49
the greater the pKb value the weaker the base. In this case hypobromite has the smallest at 5.31 compared to morphine's 5.79, therefore being the strongest.
- Sun Dec 09, 2018 2:27 am
- Forum: Administrative Questions and Class Announcements
- Topic: Worksheet 4 Key
- Replies: 1
- Views: 303
Worksheet 4 Key
I'm trying to check my answers for worksheet 4 but I couldn't find the answer key anywhere. Was there ever one?
- Sun Dec 09, 2018 2:25 am
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 453041
Re: Advice from a Medical Student [ENDORSED]
Thank you Ashley! I agree, Lavelle is a great professor and he's extremely helpful!
- Sun Dec 09, 2018 2:22 am
- Forum: SI Units, Unit Conversions
- Topic: formula units [ENDORSED]
- Replies: 69
- Views: 33037
Re: formula units [ENDORSED]
Are their specific units that we should be using? I usually just follow the units given in the problem, but as I was working through one the answer was given in mL instead of L.
- Sun Dec 09, 2018 2:18 am
- Forum: General Science Questions
- Topic: Studying Methods
- Replies: 6
- Views: 1068
Re: Studying Methods
i've been reviewing the discussion worksheets and I have found those very helpful.
- Sun Dec 09, 2018 2:16 am
- Forum: General Science Questions
- Topic: Equations Given on the Final
- Replies: 2
- Views: 427
Equations Given on the Final
Will the Constants and Formulas given be the same as the previous tests/midterms? Or will it provide more information?
- Sun Dec 09, 2018 2:14 am
- Forum: General Science Questions
- Topic: Can We Take The Final In Pencil?
- Replies: 14
- Views: 1651
Re: Can We Take The Final In Pencil?
It must be written in pencil if you're think you will need to ask for regrade, but this is a final so i doubt it will matter.
- Sun Dec 09, 2018 2:12 am
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 156017
Re: Reading the textbook
I have my roommates old course reader which is basically Lavelle's lectures condensed. I find it helpful to align my notes/examples given in class with the course reader as a refresher of what was covered in lecture. For a better understanding of the concepts I read that specific chapter in the text...
- Sat Dec 08, 2018 3:42 pm
- Forum: Student Social/Study Group
- Topic: Structure of the final
- Replies: 4
- Views: 887
Structure of the final
Does anybody know how many questions will be on the final?
- Sat Dec 08, 2018 3:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21749
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Will the final be similar to this practice final?
- Sat Dec 08, 2018 3:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21749
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
THANK YOU SO MUCH!!! THIS IS DEFINITELY A HUGE HELP!!
- Thu Nov 29, 2018 3:51 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Two chemists go into a restaurant.
The first one says "I think I'll have an H2O."
The second one says "I think I'll have an H2O too" -- and he died.
The first one says "I think I'll have an H2O."
The second one says "I think I'll have an H2O too" -- and he died.
- Thu Nov 29, 2018 3:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
A: If you can't helium, and you can't curium, then you might as well barium.
- Thu Nov 29, 2018 3:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891693
Re: Post All Chemistry Jokes Here
Q: What is the chemical formula for "coffee"?
A: CoFe2
A: CoFe2
- Fri Nov 02, 2018 7:06 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Elements we have to memorize for the Midterm
- Replies: 4
- Views: 702
Re: Elements we have to memorize for the Midterm
I’m assuming they’ll provide a periodic table like they have in the test. I doubt they make us memorize all the elements.
- Fri Nov 02, 2018 7:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Scantron
- Replies: 6
- Views: 607
Re: Scantron
So the midterm should be formatted just like the test?
- Fri Nov 02, 2018 6:57 pm
- Forum: Student Social/Study Group
- Topic: Midterm
- Replies: 15
- Views: 1579
Re: Midterm
Do we know how many questions from each section will be in the test? Like how many from the fundamentals, quantum, and chemical bonds? I know there’s 8 but how is it going to be divided?
- Fri Nov 02, 2018 6:57 pm
- Forum: Student Social/Study Group
- Topic: Midterm
- Replies: 15
- Views: 1579
Re: Midterm
Do we know how many questions from each section will be in the test? Like how many from the fundamentals, quantum, and chemical bonds? I know there’s 8 but how is it going to be divided?
- Wed Oct 24, 2018 4:27 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 2.53 Predict how many unpaired electrons...
- Replies: 2
- Views: 282
2.53 Predict how many unpaired electrons...
For problem 23 in chapter 2, after writing the ground-state electron configuration for each element it asks us to predict the number of unpaired electrons. How exactly do we know which ones will be unpaired?
- Fri Oct 12, 2018 8:55 am
- Forum: Student Social/Study Group
- Topic: Test Results
- Replies: 1
- Views: 275
Test Results
Will the test result be posted on CCLE or will we have to wait to get our test back?
- Fri Oct 12, 2018 8:45 am
- Forum: Significant Figures
- Topic: sig figs urgent question!
- Replies: 12
- Views: 2212
Re: sig figs urgent question!
When there is a decimal in the number always count from left to right starting with the non zero number, any zero in between the nonzeros should still be accounted for. However, if there is no decimal then count from right to left starting with the first non zero number.
- Fri Oct 12, 2018 8:40 am
- Forum: SI Units, Unit Conversions
- Topic: Homework for Week 2
- Replies: 16
- Views: 1134
Re: Homework for Week 2
What's the late policy for hw? I couldn't find it on Lavelle's syllabus, maybe i just missed it but I didn't realize hw was now being collected during discussion.