Search found 50 matches
- Sat Mar 13, 2021 11:44 pm
- Forum: *Enzyme Kinetics
- Topic: Significance of Molecularity
- Replies: 5
- Views: 410
Significance of Molecularity
Can anyone explain what the significance of molecularity is?
- Sat Mar 13, 2021 10:40 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: sign for Eo when reversing rxn
- Replies: 11
- Views: 729
Re: sign for Eo when reversing rxn
Eo is unaffected by any sort of multiplication as it is a constant standard for that reduction reaction independent of any coefficients. So if you had to multiply the anode half reaction by 2 to get matching electrons with the cathode half reaction, you do not apply this factor to the standard pote...
- Sat Mar 13, 2021 9:32 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: sign for Eo when reversing rxn
- Replies: 11
- Views: 729
sign for Eo when reversing rxn
When finding standard potentials, if the equation needs to be reversed on the table, do you just flip the sign of Eo?
- Sat Mar 13, 2021 8:55 pm
- Forum: Balancing Redox Reactions
- Topic: Cl2O7 --> ClO2-
- Replies: 5
- Views: 482
Re: Cl2O7 --> ClO2-
The first thing I did was balance the chlorines. After that I balance the oxygens by adding water to the right side, and then I balanced the hydrogens by adding water to the left side. Since adding more water to the left side added more oxygens to that side, I added hydroxides to the right side (si...
- Sat Mar 13, 2021 8:54 pm
- Forum: Balancing Redox Reactions
- Topic: Cl2O7 --> ClO2-
- Replies: 5
- Views: 482
Re: Cl2O7 --> ClO2-
The first thing I did was balance the chlorines. After that I balance the oxygens by adding water to the right side, and then I balanced the hydrogens by adding water to the left side. Since adding more water to the left side added more oxygens to that side, I added hydroxides to the right side (si...
- Sat Mar 13, 2021 8:12 pm
- Forum: Balancing Redox Reactions
- Topic: Cl2O7 --> ClO2-
- Replies: 5
- Views: 482
Cl2O7 --> ClO2-
How would you balance the half reaction (in a basic solution): Cl2O7 --> ClO2-
I swear I've been following all of the steps but can't do it for the life of me
I swear I've been following all of the steps but can't do it for the life of me
- Fri Mar 12, 2021 11:20 pm
- Forum: Student Social/Study Group
- Topic: Note Taking
- Replies: 145
- Views: 15085
Re: Note Taking
I typically like to type my notes because I feel like it's easier to save and refer to them later but for this class I hand wrote my notes because of all of the math and graphs.
- Fri Mar 12, 2021 11:18 pm
- Forum: Student Social/Study Group
- Topic: waitlist for a class
- Replies: 11
- Views: 630
Re: waitlist for a class
Also, does anyone have writing class recommendations for if I don't get into chem 14cl?
- Fri Mar 12, 2021 11:17 pm
- Forum: Student Social/Study Group
- Topic: waitlist for a class
- Replies: 11
- Views: 630
waitlist for a class
I'm on the waitlist currently for 14CL. Does anyone know if I'm likely going to be able to get into the class? Also, how easy is it to change section times once you're in a class?
- Fri Mar 12, 2021 11:16 pm
- Forum: Student Social/Study Group
- Topic: Spring Quarter
- Replies: 60
- Views: 2944
Re: Spring Quarter
taking 14C and CL if I get off the waitlist!
- Fri Mar 12, 2021 11:14 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: catalysts and reverse rxns
- Replies: 3
- Views: 275
catalysts and reverse rxns
Do catalysts affect the rate or Ea of reverse reactions?
- Fri Mar 12, 2021 11:12 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Electrochemistry
- Replies: 9
- Views: 597
Re: Electrochemistry
you may also need to use equation: lnK=nFEcell o/RT
because both sides equal delta Go
because both sides equal delta Go
- Fri Mar 12, 2021 11:09 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Electrochemistry
- Replies: 9
- Views: 597
Re: Electrochemistry
Kareena Patel 1G wrote:I think that these are the ones we need to know. Most of them are on the equation sheet though. Screen Shot 2021-03-08 at 9.32.51 AM.png
for the last 2 equations, why does ln change to log?
- Fri Mar 12, 2021 11:07 pm
- Forum: Balancing Redox Reactions
- Topic: Balance reaction using OH- or H+
- Replies: 18
- Views: 759
Re: Balance reaction using OH- or H+
acidic solutions:
- balance O using H2O
- balance H using H+
basic solutions:
- balance O using H2O
- balance H by adding H20 to one side and OH- to the other
- balance O using H2O
- balance H using H+
basic solutions:
- balance O using H2O
- balance H by adding H20 to one side and OH- to the other
- Fri Mar 12, 2021 7:34 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: A (pre-exponential factor)
- Replies: 3
- Views: 201
Re: A (pre-exponential factor)
It represents the frequency of collisions between reactant molecules at standard concentration (which is why it's also called frequency factor). It is temperature-dependent and should be given to you unless you're needing to find it, in which case you would use the Arrhenius equation and plugin val...
- Fri Mar 12, 2021 7:30 pm
- Forum: Student Social/Study Group
- Topic: Doubts about Pre-Med or Pre-Professional School
- Replies: 17
- Views: 962
Re: Doubts about Pre-Med or Pre-Professional School
Also, there are many other pre-health options other than being pre-med! I've also considered becoming a PA. I think ls 110 is a class that gives options for potential careers in life sciences other than being a physician.
- Fri Mar 12, 2021 7:28 pm
- Forum: Student Social/Study Group
- Topic: Doubts about Pre-Med or Pre-Professional School
- Replies: 17
- Views: 962
Re: Doubts about Pre-Med or Pre-Professional School
I feel the same sometimes! It's helpful to remember that you won't need to know the material we are learning to be successful at your job someday! Besides needing chemistry knowledge for the MCAT, you don't need to be a chem genius to be a good doctor. Upper division classes should also be more inte...
- Fri Mar 12, 2021 7:24 pm
- Forum: Student Social/Study Group
- Topic: Classes for next quarter?
- Replies: 165
- Views: 13038
Re: Classes for next quarter?
Is there a GroupMe started for 14C?
- Fri Mar 12, 2021 7:23 pm
- Forum: Student Social/Study Group
- Topic: Classes for next quarter?
- Replies: 165
- Views: 13038
Re: Classes for next quarter?
Chem 14C, on the waitlist for CL, Psych 100B and looking to add another. Any suggestions?
- Fri Mar 12, 2021 7:22 pm
- Forum: Student Social/Study Group
- Topic: 14C
- Replies: 2
- Views: 379
Re: 14C
Oops, this was supposed to be posted in the 14B section not 14A
- Fri Mar 12, 2021 7:21 pm
- Forum: Student Social/Study Group
- Topic: 14C
- Replies: 2
- Views: 379
14C
Who's taking 14C next quarter? Is there a groupme started for it?
- Fri Mar 12, 2021 7:16 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: A (pre-exponential factor)
- Replies: 3
- Views: 201
A (pre-exponential factor)
Can someone explain the pre-exponential factor (A) and its significance?
- Mon Mar 01, 2021 2:46 pm
- Forum: Student Social/Study Group
- Topic: Moving to Westwood soon. Which restaurants should I visit?
- Replies: 45
- Views: 2495
Re: Moving to Westwood soon. Which restaurants should I visit?
Tacos tu Madre!
- Mon Mar 01, 2021 2:46 pm
- Forum: Student Social/Study Group
- Topic: Moving to Westwood soon. Which restaurants should I visit?
- Replies: 45
- Views: 2495
Re: Moving to Westwood soon. Which restaurants should I visit?
Tacos tu Madre!
- Mon Mar 01, 2021 2:44 pm
- Forum: Student Social/Study Group
- Topic: Fave food
- Replies: 266
- Views: 28612
Re: Fave food
ice cream and pasta!
- Mon Mar 01, 2021 2:42 pm
- Forum: Student Social/Study Group
- Topic: Classes for next quarter?
- Replies: 165
- Views: 13038
Re: Classes for next quarter?
I am planning to take Chem 14C, LS7B, LS23L, Psych 100A, and might try to enroll in Ling 1, although the fact that its 100 spot waitlist is closed may stop me from doing that HAHA. I'm not too disappointed with that since the four classes I'm planning to take require a lot of my time and attention,...
- Mon Mar 01, 2021 2:40 pm
- Forum: Student Social/Study Group
- Topic: Classes for next quarter?
- Replies: 165
- Views: 13038
Re: Classes for next quarter?
I'm planning on taking Chem 14C, Psych 100B, and I really wanted to take 14CL but I have to wait and see if some spots open up. I'm also taking LS 110 because all of the other classes I need to take are full.
- Sun Feb 14, 2021 12:41 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Sapling #5 week 5 and 6
- Replies: 13
- Views: 598
Re: Sapling #5 week 5 and 6
Jayasree Peri 2J wrote:Katy Austin 1K wrote:Also can someone check if this is correct:
P should be in bars
V should be in L
T should be in K
I actually converted P from bars to atm using the 1 atm = 101.325 bar conversion. I did this because there is no R constant that has atm as the unit for pressure.
ok awesome thank you!
- Sun Feb 14, 2021 12:38 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Sapling #5 week 5 and 6
- Replies: 13
- Views: 598
Re: Sapling #5 week 5 and 6
Jayasree Peri 2J wrote:Katy Austin 1K wrote:Also can someone check if this is correct:
P should be in bars
V should be in L
T should be in K
I actually converted P from bars to atm using the 1 atm = 101.325 bar conversion. I did this because there is no R constant that has atm as the unit for pressure.
ok awesome thank you!
- Sun Feb 14, 2021 12:12 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Sapling #5 week 5 and 6
- Replies: 13
- Views: 598
Re: Sapling #5 week 5 and 6
Also can someone check if this is correct:
P should be in bars
V should be in L
T should be in K
P should be in bars
V should be in L
T should be in K
- Sun Feb 14, 2021 12:11 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Sapling #5 week 5 and 6
- Replies: 13
- Views: 598
Re: Sapling #5 week 5 and 6
Hi! I am also stuck on this problem and I am wondering does R= 8.314 J/molK in the equation PV=nRT?
- Tue Feb 02, 2021 9:29 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2991077
Re: Post All Chemistry Jokes Here
I hope this hasn't been done already because I love this joke...
Q: What kind of dogs do scientists have?
A: Laboratory Retrievers
Q: What kind of dogs do scientists have?
A: Laboratory Retrievers
- Tue Feb 02, 2021 9:27 pm
- Forum: Student Social/Study Group
- Topic: 14C and CL
- Replies: 8
- Views: 732
Re: 14C and CL
To the girl asking about the difference between 14C and CL: CL is the second lab course for the 14 series. You have to take it either at the same time or after completing 14C.
- Tue Feb 02, 2021 9:25 pm
- Forum: Student Social/Study Group
- Topic: Test curve?
- Replies: 40
- Views: 2811
Test curve?
I know it wasn't uncommon for chemistry professors to curve their class' midterm grades when everything was in person. Is that something that could still happen for online tests?
- Tue Feb 02, 2021 9:23 pm
- Forum: Student Social/Study Group
- Topic: Worried About MT 1 Grades
- Replies: 39
- Views: 1628
Re: Worried About MT 1 Grades
Hi! I also felt the same way! I thought I had prepared really well and felt fairly confident going into the test but felt super confused by almost half of the questions. You're not alone! I had a different professor last quarter who had free-response tests which I think I preferred because I could u...
- Tue Feb 02, 2021 9:20 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 58
- Views: 2790
Re: Hess's Law
It's also helpful to remember that you only need to focus on net changes! Since it is a state function, you don't have to worry about every specific input and output - just make sure you understand what the net change is.
- Tue Feb 02, 2021 9:20 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 58
- Views: 2790
Re: Hess's Law
It's also helpful to remember that you only need to focus on net changes! Since it is a state function, you don't have to worry about every specific input and output - just make sure you understand what the net change is.
- Tue Feb 02, 2021 9:16 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2991077
Re: Post All Chemistry Jokes Here
Q: What is a chem student's favorite sushi?
A: Spicy 2-Na roll!
A: Spicy 2-Na roll!
- Tue Feb 02, 2021 9:15 pm
- Forum: Student Social/Study Group
- Topic: Best study methods
- Replies: 3
- Views: 213
Best study methods
Which practice questions are the most useful for test prep? Sapling? Homework? TA/LA reviews? I know Dr. Lavelle says he takes questions from Sapling and the homework but I made sure to do all of those practice problems and still found the midterm to be confusing.
- Tue Feb 02, 2021 9:14 pm
- Forum: Student Social/Study Group
- Topic: Best study methods
- Replies: 9
- Views: 437
Best study methods
Which practice questions are the most useful for test prep? Sapling? Homework? TA/LA reviews? I know Dr. Lavelle says he takes questions from Sapling and the homework but I made sure to do all of those practice problems and still found the midterm to be confusing.
- Tue Feb 02, 2021 9:11 pm
- Forum: Student Social/Study Group
- Topic: Midterm Grades
- Replies: 15
- Views: 641
Re: Midterm Grades
He just sent out an update that the grade should be in by the end of tomorrow (Wednesday of week 5) night!
- Tue Feb 02, 2021 9:11 pm
- Forum: Student Social/Study Group
- Topic: Midterm Grades
- Replies: 15
- Views: 641
Re: Midterm Grades
He just sent out an update that the grade should be in by the end of tomorrow (Wednesday of week 5) night!
- Sun Jan 24, 2021 6:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: How to tell if a salt is acidic, basic or neutral
- Replies: 7
- Views: 1168
How to tell if a salt is acidic, basic or neutral
How can you tell if a salt is acidic, basic, or neutral?
- Sun Jan 24, 2021 5:25 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: percent ionization
- Replies: 4
- Views: 184
percent ionization
What is the equation for percent ionization? Is percent ionization just the same thing as percent deprotonation?
- Wed Jan 20, 2021 3:49 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: (I) in chemical rxns
- Replies: 3
- Views: 133
(I) in chemical rxns
Hi, can someone remind me what the (I) is after compounds in written chemical reactions?
- Sun Jan 10, 2021 10:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K Favors Products or Reactants
- Replies: 20
- Views: 571
Re: K Favors Products or Reactants
If K > 10^3, equilibrium strongly favors P and if K<10^-3, equilibrium strongly favors R. Intermediate values (10^-3<K< 10^3) of K don't strongly favor either products or reactants but do slightly favor them.
- Sun Jan 10, 2021 10:48 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Sapling #2
- Replies: 4
- Views: 178
Re: Sapling #2
The ICE tables that Dr. Lavelle discussed on Friday should probably help!
- Sun Jan 10, 2021 10:46 pm
- Forum: Student Social/Study Group
- Topic: GroupMe for lecture 1
- Replies: 1
- Views: 138
GroupMe for lecture 1
Has anyone started a GroupMe for lecture 1 for reminders and study groups and such?
- Sun Jan 10, 2021 10:46 pm
- Forum: Student Social/Study Group
- Topic: GroupMe for lecture 1 discussion 1K
- Replies: 1
- Views: 148
GroupMe for lecture 1 discussion 1K
Has anyone started a GroupMe for discussion 1K?
- Sun Jan 10, 2021 10:42 pm
- Forum: Ideal Gases
- Topic: Inert Gas
- Replies: 20
- Views: 565
Re: Inert Gas
Inert gases are usually noble gases that typically don't have an effect on the reaction taking place. As Dr. Lavelle said in lecture, adding an inert gas changes the pressure but will not change the concentrations of the reactants and therefore will have no effect on K.