Search found 14 matches

by Rachel Song 2A
Tue Feb 09, 2016 10:31 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Higher Residual Entropy
Replies: 1
Views: 332

Higher Residual Entropy

Could someone please explain what higher residual entropy is and how to solve for it?
The question I was looking at is Q3A of Winter Midterm 2012 and I do not understand how they solved for the answer.
by Rachel Song 2A
Tue Feb 09, 2016 10:29 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Practice Midterm Winter 2011 Q 7&8 C
Replies: 2
Views: 404

Practice Midterm Winter 2011 Q 7&8 C

The question is "What is K subscript eq and delta G at 25 degrees C?"
I understand how to solve for delta G but how and why does log of K subscript eq equal nE/0.0592V? Where does this equation come from and where does 0.0592V come from?
by Rachel Song 2A
Tue Feb 09, 2016 10:26 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Practice Midterm Winter 2011 Q 6D
Replies: 1
Views: 220

Practice Midterm Winter 2011 Q 6D

Hello, I have a question on 6D of Winter Midterm 2011. It says to calculate E at 25 degrees C when the concentration of the products and reactants are all 0.100M. I looked at the answer and how it was solved but I'm really confused to how 0.0592V was calculated. It comes up again in other questions ...
by Rachel Song 2A
Sun Nov 29, 2015 11:46 pm
Forum: Bond Lengths & Energies
Topic: 3.85 Decreasing bond length
Replies: 1
Views: 793

3.85 Decreasing bond length

3.85 Place the following molecules or ions in order of decreasing bond length: (b) the SO bond in SO2, SO3, SO3 2- Could someone please explain part b to me? I understood part a and part c but when I tried to solve part b, I didn't understand how it was put into order of decreasing bond length and t...
by Rachel Song 2A
Sun Nov 29, 2015 10:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.31 Relative orientation of hybrid orbitals
Replies: 1
Views: 1623

4.31 Relative orientation of hybrid orbitals

4.31 State the relative orientations of the following hybrid orbitals: (a) sp3; (b) sp; (c) sp3d2; (d) sp2.

How would we determine the orientations for hybrid orbitals? Is there a chart or table somewhere?
by Rachel Song 2A
Sun Nov 29, 2015 10:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.19 Predict shape of molecule
Replies: 2
Views: 716

4.19 Predict shape of molecule

4.19 Predict the shapes and estimate the bond angles of (d) SnCl2.

Could someone please explain how to predict the shape of this moleculre? The answer key says it's angular but I thought it was linear. How would you draw the Lewis structure for this?
by Rachel Song 2A
Sun Nov 29, 2015 10:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.7 Determine Equilibrium
Replies: 1
Views: 323

11.7 Determine Equilibrium

11.7 The following flasks show the dissociation of a diatomic molecule, X2, over time. (a) Which fl ask represents the point in time at which the reaction has reached equilibrium? (b) What percentage of the X2 molecules have decomposed at equilibrium? (c) Assuming that the initial pressure of X2 was...
by Rachel Song 2A
Sun Nov 29, 2015 9:46 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 17.37 Determine coordination number
Replies: 4
Views: 1306

17.37 Determine coordination number

17.37 With the help of Table 17.4, determine the coordination number of the metal ion in each of the following complexes: (a) [NiCl4]2; (b) [Ag(NH3)2]; (c) [PtCl2(en)2]2; (d) [Cr(edta)]. How do you determine the coordination number for a metal ion? I used the table and watched the podcast on thi...
by Rachel Song 2A
Sun Nov 29, 2015 9:45 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 17.35 Chelating Compounds
Replies: 5
Views: 573

17.35 Chelating Compounds

17.35 Which of the following isomers of diaminobenzene can form chelating complexes? Explain. (Pictures of the isomers not included)

What exactly are chelating complexes and how do we determine that an isomer can form a chelating complex?
by Rachel Song 2A
Sun Nov 29, 2015 1:35 am
Forum: Ionic & Covalent Bonds
Topic: Question 3.9 Ground state electron configuration
Replies: 2
Views: 3422

Question 3.9 Ground state electron configuration

3.9 Which M2+ ions (where M is a metal) are predicted to have the following ground-state electron configurations: (a) [Ar]3d7;
(b) [Ar]3d6; (c) [Kr]4d4; (d) [Kr]4d3?

How are we supposed to figure this out? What are the steps involved in answering this question?
by Rachel Song 2A
Tue Nov 03, 2015 4:48 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Helpful Video on Molecular Orbital Diagram
Replies: 2
Views: 468

Helpful Video on Molecular Orbital Diagram

Hello, here is a link to a very helpful and short video that I found on filling out an MO diagram.
I hope it's as useful for you guys as it was for me!
https://www.youtube.com/watch?v=pT0Y0OKkzUM
by Rachel Song 2A
Mon Nov 02, 2015 11:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Answers to Quizzes
Replies: 1
Views: 603

Answers to Quizzes

Is there a way for the TA's to post the answers and answer processes to Quiz 1 and Quiz 2? Some of the corrections on my quiz don't have the answer written on them and I would really like to know that I'm correcting the questions the right way.
by Rachel Song 2A
Mon Nov 02, 2015 11:34 pm
Forum: Administrative Questions and Class Announcements
Topic: Video Recording of my Chem 14A Review Session Fall 2015
Replies: 5
Views: 9754

Re: Video Recording of my Chem 14A Review Session Fall 2015

I'm having difficulty being able to watch the video. I downloaded the software and installed it to my computer but it keeps telling me to install the software again. Is there another medium the review session could be uploaded to, like youtube?
by Rachel Song 2A
Fri Oct 02, 2015 5:25 pm
Forum: *Shrodinger Equation
Topic: Schrodinger Equation
Replies: 2
Views: 497

Schrodinger Equation

Could someone please explain the Schrodinger Equation to me? What is the purpose of this equation and why is there a right-hand side as well as a left-hand side? And why is the left-hand side called the "Hamiltonian for the system"?

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