## Search found 18 matches

Fri Mar 17, 2017 2:44 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Winter Final 2016 Q3C
Replies: 1
Views: 260

### Winter Final 2016 Q3C

Why did we keep AgBr(s) together on the oxidation side for the cell notation? shouldn't they be separated?
Tue Mar 14, 2017 11:40 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation
Replies: 2
Views: 476

### Nernst Equation

Do we need to memorize the nernst equation relating to pH, or will it be given to us?

EQ: Ecell= E-0.0592/n (log10(Q))
Tue Mar 14, 2017 11:11 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 2013 final Q3C
Replies: 1
Views: 307

### 2013 final Q3C

for part 3C, how do we know that n=6mol?
Sun Mar 12, 2017 6:18 pm
Forum: *Chem3D
Topic: Shape of Organic Molecules
Replies: 2
Views: 725

### Shape of Organic Molecules

Just to confirm, the more stable geometry or setup of organic molecules are those in which the hydrogen atoms are farthest away from each other (to prevent any "rubbing" up against one another)? would a situation in which the neighboring hydrogen molecules are interacting with each other e...
Sun Mar 05, 2017 4:58 pm
Forum: *Nucleophiles
Topic: movement of electrons
Replies: 2
Views: 661

### movement of electrons

does the passing of electrons come from the atoms themselves or from the bonds they create?
Wed Feb 22, 2017 12:55 pm
Forum: General Rate Laws
Topic: Rxn Rates
Replies: 3
Views: 299

### Re: Rxn Rates

Which integrated rate law?
Wed Feb 22, 2017 12:42 pm
Forum: General Rate Laws
Topic: Rxn Rates
Replies: 3
Views: 299

### Rxn Rates

I understand that rate=delta concentration/delta t; but i also know that R=k[A]^x[B]^y...are these the same rates? how do you relate these two equations. for example, if you're given the change in concentration, the k value and you are asked for the time is takes to decrease or increase a concentrat...
Sun Feb 12, 2017 2:31 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Winter 2015 Midterm Question 2 and 3 D
Replies: 5
Views: 769

### Winter 2015 Midterm Question 2 and 3 D

p. 149 of the course reader:
For part D, i am confused on how to set up this equation, could someone explain how you know which bond enthalpies to subtract and add?
Thu Feb 09, 2017 11:31 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Gas Constant Question
Replies: 1
Views: 290

### Gas Constant Question

I see on the formula sheet that there are various forms of "R"-- the gas constant. How do we know which ones to use in calculations?
Thu Feb 02, 2017 1:40 pm
Forum: Administrative Questions and Class Announcements
Replies: 130
Views: 17213

### Re: Quiz 1 Preparation Answers

for #12, do we multiply the coefficients of the balanced equation by both the delta h and s values?
Sat Jan 28, 2017 6:58 pm
Forum: Van't Hoff Equation
Topic: Van't hoff equation
Replies: 1
Views: 502

### Van't hoff equation

I know this is a bit of an open ended question, but could someone explain each of the components of the van't hoff equation to me? i am a bit confused.
Sat Jan 21, 2017 2:20 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy
Replies: 2
Views: 360

### Re: Entropy

I also have a similar question! But what I do know is that they are somewhat inversely related: at equilibrium, a system will have the LOWEST amount of energy. However, with entropy, at equilibrium, a system will be at its maximum entropy.
Sun Jan 15, 2017 4:31 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Question about work on systems
Replies: 1
Views: 188

### Question about work on systems

How can you tell if work is being done ON or BY a system?
Sun Nov 27, 2016 5:17 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium
Replies: 1
Views: 300

### Equilibrium

What are good methods to determine if something is an acid or a base when looking at a chemical reaction?
Sun Oct 30, 2016 11:11 am
Forum: Hybridization
Topic: Process of determining bond types
Replies: 1
Views: 309

### Process of determining bond types

Just to clarify, in order to decipher the types of bond in a compound, you must first: draw lewis structure, then find out the shape, and then figure out the bonds?
Sun Oct 16, 2016 4:43 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Naming Elements
Replies: 1
Views: 225

### Naming Elements

How do you know if the p or d
orbital should be listed first? for example, if you were naming Zr?
Sun Oct 09, 2016 2:10 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant [ENDORSED]
Replies: 2
Views: 530

### Limiting Reactant[ENDORSED]

In a limiting reactant problem, how do you know which mol ratios you're supposed to compare?

For example #9 on the self test in the workbook: for the following equation, determine the limiting reagent is 22.4gNH3 is reacted with 40.5g of CO2

NH3(g) + O2 (g) ---> NO(g) + H20(g)
Fri Sep 30, 2016 2:48 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect
Replies: 2
Views: 357

### Photoelectric effect

If there is just enough energy (from an ultraviolet radiation source) hitting a metal source (E(photon)= 0 and the E(energy removed)=0), will electrons be emitted from a metal source?