Search found 26 matches

by Helena Vervaet 1N
Wed Mar 15, 2017 7:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Details and Review Sessions Winter 2017
Replies: 114
Views: 13632

Re: Final Exam Details and Review Sessions Winter 2017

In regards to homework questions that may be on the exam - Can these questions come from any problem set over the course of the quarter? Or will they only come from homework problems assigned after the midterm? Thanks!
by Helena Vervaet 1N
Wed Mar 15, 2017 7:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Details and Review Sessions Winter 2017
Replies: 114
Views: 13632

Re: Final Exam Details and Review Sessions Winter 2017

For question 3C from the winter 2016 final: I assumed that AgBr would dissociate in solution, leaving Ag + and Br - . Because of this, I wrote my cell diagram as Ag(s)|Ag + (aq)||Br - (aq)|Br 2 (g)|Pt(s) Why is this incorrect? And why, in the correct answer, can you use Br - (aq) for the cathode but...
by Helena Vervaet 1N
Mon Mar 13, 2017 10:58 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

Pushed didn't read the lab safety rules
by Helena Vervaet 1N
Thu Mar 02, 2017 9:54 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

Poor Susie </3
by Helena Vervaet 1N
Thu Mar 02, 2017 9:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

Lol!
by Helena Vervaet 1N
Thu Mar 02, 2017 9:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

Cute cartoon!
by Helena Vervaet 1N
Fri Feb 24, 2017 2:19 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

What we reviewed in class today:
by Helena Vervaet 1N
Tue Feb 14, 2017 3:50 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Units for Gibbs Free Energy
Replies: 4
Views: 338

Units for Gibbs Free Energy

Is there a difference between using kJ vs. kJ/mol when labelling Gibbs Free Energy? I've run across a few problems where you must multiply each molecule's standard value of formation by its number of moles in the reaction, but sometimes the units for the free energy of the reaction are written diffe...
by Helena Vervaet 1N
Thu Feb 09, 2017 4:18 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Winter 2013 Midterm #8B
Replies: 2
Views: 296

Winter 2013 Midterm #8B

When I was solving for the concentration of Fe 2+ ions, I used the Nernst Equation that included ln instead of log. For most of the other problems in that midterm, answers using either ln or log were both stated as acceptable, but for #8B (pg.135) it looks like only the log equation should have been...
by Helena Vervaet 1N
Tue Feb 07, 2017 10:42 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm Winter 2017
Replies: 87
Views: 14432

Re: Midterm Winter 2017

Will we need to do derivations on the midterm? Or will it be similar to last quarter where we did not need to worry about them? Thanks!
by Helena Vervaet 1N
Tue Feb 07, 2017 10:41 am
Forum: Student Social/Study Group
Topic: Study group for mid term
Replies: 4
Views: 625

Re: Study group for mid term

Would you guys be having the study session somewhere on the hill? I'd love to come and join(:
by Helena Vervaet 1N
Tue Jan 31, 2017 4:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 13718

Re: Quiz 1 Preparation Answers

-Write out the equation for the combustion of propane and make sure to balance the eqn. -From the given standard enthalpy of combustion (kJ/mol), figure out how many moles of propane is burned in order to release 2580. kJ of heat.(use stoichiometry). -Convert moles to mass using MM. Just let me kno...
by Helena Vervaet 1N
Mon Jan 30, 2017 4:11 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light!"
by Helena Vervaet 1N
Mon Jan 30, 2017 4:08 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

Two chemists go into a bar. 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 shortly afterwards.
by Helena Vervaet 1N
Fri Jan 20, 2017 10:59 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018007

Re: Post All Chemistry Jokes Here

What do you do with a sick chemist?
If you can't helium and you can't curium, you might as well barium!
by Helena Vervaet 1N
Sat Dec 03, 2016 11:06 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: HClO3 as an acid
Replies: 1
Views: 580

HClO3 as an acid

I was just wondering whether or not we consider HClO3 to be a strong acid? In the list of strong acids on page 163 of the course reader, it isn't listed. However, in some of the review sessions I believed I heard some of the TAs saying that we are considering it as a strong acid for this class? Just...
by Helena Vervaet 1N
Sat Dec 03, 2016 10:36 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Confusion with n, l, ml, ms.
Replies: 2
Views: 621

Re: Confusion with n, l, ml, ms.

If the question states that n=2 and l=0, you would be looking at the s subshell of row 2. If we look at the periodic table, we can see that there are only 2 elements that fall in this specific subshell (lithium and beryllium) so your answer would then be 2. Boron, carbon, nitrogen, oxygen, fluorine,...
by Helena Vervaet 1N
Sat Nov 26, 2016 9:19 pm
Forum: Student Social/Study Group
Topic: Final Study Group
Replies: 12
Views: 1384

Re: Final Study Group

I think it's a great idea to meet up on Tuesday once we're all probably back at UCLA again - Courtside is usually a pretty quiet building in general so I think Celina's idea to meet there would work perfectly! And if it's too busy in C6 for some reason, we can always check out one of the other loung...
by Helena Vervaet 1N
Sat Nov 19, 2016 11:54 pm
Forum: Lewis Acids & Bases
Topic: Reaction of 2 H20 [ENDORSED]
Replies: 1
Views: 240

Reaction of 2 H20 [ENDORSED]

Could someone please remind me how we know that the reaction
2H2O (l) <=> H3O+ (aq)+ OH- (aq)
heavily favors the left hand side? I was going through my notes and it looks like I hadn't made a note of the reason why. Thank you!
by Helena Vervaet 1N
Sat Nov 19, 2016 11:46 pm
Forum: Student Social/Study Group
Topic: Final Study Group
Replies: 12
Views: 1384

Re: Final Study Group

I think it would be a great idea to have a final study group! Would anyone else like to?
by Helena Vervaet 1N
Sun Nov 13, 2016 4:01 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding Coordination Number and Oxidation State [ENDORSED]
Replies: 7
Views: 1206

Re: Finding Coordination Number and Oxidation State [ENDORSED]

Thank you for correcting my mistake, Matt! I keep confusing NH3 with NH4, which is why I thought there was a +1 charge. Sorry if I caused any confusion!
by Helena Vervaet 1N
Sun Nov 13, 2016 3:13 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding Coordination Number and Oxidation State [ENDORSED]
Replies: 7
Views: 1206

Re: Finding Coordination Number and Oxidation State [ENDORSED]

The coordination number essentially means the number of bonds that form around the central atom (The transition metal). In the example you gave, the coordination number would be 4 because there are 4 molecules that form bonds with Pt. In order to find the oxidation number, you need to look at the ch...
by Helena Vervaet 1N
Sun Nov 13, 2016 2:14 pm
Forum: Naming
Topic: Atoms Outside of the Coordination Complex
Replies: 1
Views: 242

Atoms Outside of the Coordination Complex

When you have an atom outside of the coordination complex - Such as the K in K2[Ni(CN)4)] - does it affect the coordination number of the complex at all? What does it bond to? Thanks!
by Helena Vervaet 1N
Fri Nov 11, 2016 3:49 pm
Forum: Ionic & Covalent Bonds
Topic: Polar/Nonpolar Covalent bonds vs. Ionic bonds
Replies: 1
Views: 585

Polar/Nonpolar Covalent bonds vs. Ionic bonds

This is a question I asked a while ago, but my post didn't go through and I'd love some clarification! I remember in my high school chemistry class we split bonds into those three different categories based on specific electronegativity differences (For example, a non polar bond would be a differenc...
by Helena Vervaet 1N
Fri Nov 11, 2016 3:41 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Molecular Orbital Theory for HF
Replies: 1
Views: 310

Molecular Orbital Theory for HF

Possibly a silly question but could someone give me a quick explanation about why the 1S atomic orbital for hydrogen is roughly the same energy as the 2P orbital for Fluorine? I assumed that hydrogen's 1S orbital would be closer in energy to fluorine's 2S orbital than the 2P. Thanks a bunch(:
by Helena Vervaet 1N
Fri Sep 30, 2016 3:15 pm
Forum: Administrative Questions and Class Announcements
Topic: Where to begin? [ENDORSED]
Replies: 8
Views: 971

Re: Where to begin? [ENDORSED]

The video modules have been an amazing review tool both before the class began and after the lectures during the week (I 100% recommend using them), but do the topics posted on the class website stretch for the entire quarter? Or are there chapters later on that won't be accompanied by those videos?...

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