Search found 30 matches
- Fri Mar 15, 2019 11:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Approximation & Cubic Equations on Final
- Replies: 2
- Views: 520
Re: Approximation & Cubic Equations on Final
Didn't he say on the midterm to not approximate when we weren't supposed to?
- Fri Mar 15, 2019 11:06 pm
- Forum: Zero Order Reactions
- Topic: Zero-order reactions
- Replies: 4
- Views: 686
Re: Zero-order reactions
I think it is M.s^-1
- Fri Mar 15, 2019 11:05 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: writing rate laws: "rate"or "d[A]/dt?"
- Replies: 1
- Views: 258
Re: writing rate laws: "rate"or "d[A]/dt?"
I think it's the same, but we've just been writing rate.
- Fri Mar 15, 2019 11:04 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Deriving
- Replies: 3
- Views: 687
Re: Deriving
Yeah I agree, and probably if he went in depth on how to derive it in class.
- Fri Mar 15, 2019 11:03 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst Equation and pH
- Replies: 2
- Views: 507
Re: Nernst Equation and pH
Use Nernst to find K, and then solve the equilibrium expression for concentration and then pH.
- Fri Mar 15, 2019 11:02 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Test 2 help!
- Replies: 3
- Views: 459
Re: Test 2 help!
you have to take K and set up the expression and then use it to solve for pH.
- Fri Mar 15, 2019 11:00 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Concentration Q
- Replies: 2
- Views: 358
Re: Concentration Q
it is set up the same as K, but it is not at equilibrium.
- Fri Mar 15, 2019 11:00 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Equation sheet
- Replies: 4
- Views: 521
Re: Equation sheet
Do we need to know how to derive it?
- Fri Mar 15, 2019 10:59 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Oxidizing Power - Test 2
- Replies: 2
- Views: 318
Re: Oxidizing Power - Test 2
You don't flip the signs.
- Fri Mar 15, 2019 10:58 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: When to use Nernst
- Replies: 3
- Views: 396
Re: When to use Nernst
Do we have to know when to derive it?
- Fri Mar 15, 2019 10:57 pm
- Forum: General Rate Laws
- Topic: Determining rate order
- Replies: 3
- Views: 341
Re: Determining rate order
you can use any of them, but you have to use all the values of that experiment consistently.
- Fri Mar 15, 2019 10:55 pm
- Forum: General Rate Laws
- Topic: Final
- Replies: 9
- Views: 1106
Re: Final
I think that since the TAs do the grading they are more lenient on sig figs, but units are very important.
- Fri Mar 15, 2019 10:54 pm
- Forum: General Rate Laws
- Topic: rate laws
- Replies: 6
- Views: 641
Re: rate laws
the stoichiometric coefficients actually aren't used in the rate law.
- Fri Mar 15, 2019 10:53 pm
- Forum: General Rate Laws
- Topic: Rate laws
- Replies: 2
- Views: 374
Re: Rate laws
Yes, rate and differential rate law are the same.
- Fri Mar 15, 2019 10:51 pm
- Forum: General Rate Laws
- Topic: Unique Reaction Rates [ENDORSED]
- Replies: 45
- Views: 164071
Re: Unique Reaction Rates [ENDORSED]
When do we use the instantaneous rate versus the unique rates?
- Fri Mar 15, 2019 10:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Lyndon's Review Sheets
- Replies: 9
- Views: 1354
Re: Lyndon's Review Sheets
is he posting the answers 9 am or the worksheet?
- Fri Mar 15, 2019 10:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
- Replies: 179
- Views: 24024
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
Amy Dinh 1A wrote:On #4a Worksheet 2, I keep getting pH=4.40, while the answer key says 4.30, when both using the quadratic formula and the shortcut way. I don't understand how to get the answer to
The pH is 4.40
- Fri Mar 15, 2019 10:44 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 419313
Re: Advice from a Medical Student [ENDORSED]
Thank you so much!
- Fri Mar 15, 2019 10:43 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagram and Ecell [ENDORSED]
- Replies: 29
- Views: 113838
Re: Cell Diagram and Ecell [ENDORSED]
In which cases do you flip the sign for the E, when calculating Ecell?
- Fri Mar 15, 2019 10:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 565668
Re: Saying Thank You to Dr. Lavelle
Thank you Dr. Lavelle, for your countless resources for help, and your enthusiastic attitude in lecture.
- Fri Mar 15, 2019 10:39 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Test 2 Question 7
- Replies: 3
- Views: 583
Re: Test 2 Question 7
They are both spontaneous because they are both approaching equilibrium.
- Fri Mar 15, 2019 10:24 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Rate constants at equilibrium
- Replies: 5
- Views: 624
Re: Rate constants at equilibrium
no, it is dependent on the K
- Fri Mar 15, 2019 10:23 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Catalysts
- Replies: 2
- Views: 350
Re: Catalysts
Also, intermediates have to be formed and then consumed.
- Fri Mar 15, 2019 10:20 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Deriving
- Replies: 3
- Views: 442
Re: Deriving
I think if he went through the steps in class, he expects it of us.
- Tue Jan 22, 2019 2:40 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Rounding within the Problem
- Replies: 2
- Views: 336
Re: Rounding within the Problem
I think we round at the end, and use exact numbers till then.
- Tue Jan 22, 2019 2:38 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ignoring x
- Replies: 10
- Views: 899
Re: ignoring x
You can ignore x when it is less than 10^-3 which is very small and insubstantial
- Thu Jan 17, 2019 6:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Chem 14b weekly homework
- Replies: 2
- Views: 324
Re: Chem 14b weekly homework
All you have to do is write the question numbers, in order, and show your work.
- Fri Jan 11, 2019 6:22 pm
- Forum: Ideal Gases
- Topic: Definition of Ideal Gases?
- Replies: 3
- Views: 362
Re: Definition of Ideal Gases?
it refers to gases at STP- standard temperature and pressure
- Fri Jan 11, 2019 6:11 pm
- Forum: Ideal Gases
- Topic: Units
- Replies: 19
- Views: 1176
Re: Units
You should always convert temperatures to Kelvin in PV=nRT
- Fri Jan 11, 2019 6:03 pm
- Forum: Ideal Gases
- Topic: Q and K [ENDORSED]
- Replies: 35
- Views: 3185
Re: Q and K [ENDORSED]
K and Q are calculated in the same way.