Search found 53 matches

by chimerila
Sat Mar 14, 2020 9:04 pm
Forum: Balancing Redox Reactions
Topic: flipping equations
Replies: 7
Views: 109

Re: flipping equations

I'm still kind of confused on that too. I just know that to cancel the electrons out, make sure whatever you end up flipping, you're reduction equation has electrons on the left, and the oxidized equation has electrons on the right
by chimerila
Sat Mar 14, 2020 9:01 pm
Forum: Calculating Work of Expansion
Topic: Mnemonic for State Functions
Replies: 3
Views: 66

Re: Mnemonic for State Functions

Vinita Saxena 2I wrote:PDTVHUGS:
If you're feeling under Pressure or Depressed, all you want to do is watch TV and get HUGS. Good luck!


Oh oof, thank you, I replied before I saw this
by chimerila
Sat Mar 14, 2020 9:01 pm
Forum: Calculating Work of Expansion
Topic: Mnemonic for State Functions
Replies: 3
Views: 66

Re: Mnemonic for State Functions

Ohmygosh, I wish I could remember, I thought it was clever and very on brand for college life. Something like "The Pressure makes me feel Down and I just want to watch T.V. and get HUGS"

something like that, ugh, if someone remembers, please
by chimerila
Sat Mar 14, 2020 8:53 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Mnemonic for Oxidation and Reduction
Replies: 7
Views: 79

Re: Mnemonic for Oxidation and Reduction

Interesting, thanks for showing me the LEO one, I'll add that to my little list :D
by chimerila
Sat Mar 14, 2020 8:46 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Mnemonic for Oxidation and Reduction
Replies: 7
Views: 79

Mnemonic for Oxidation and Reduction

I find its helpful to have mnemonics for ideas, so I use LRC and ROA for reduction and oxidation. LRC - electrons are on the "L"eft side, so it's "R"educed, and it's a "C"athode ROA - electrons are on the "R"ight side, so it's "O"xidized, and it's an...
by chimerila
Sat Mar 14, 2020 8:41 pm
Forum: Student Social/Study Group
Topic: This is literally not time sensitive at all, but...
Replies: 2
Views: 106

Re: This is literally not time sensitive at all, but...

Ahh I see, thank you for the clarification
by chimerila
Sat Mar 14, 2020 8:38 pm
Forum: General Rate Laws
Topic: Video help
Replies: 3
Views: 66

Re: Video help

by chimerila
Sat Mar 14, 2020 8:34 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Qc vs Kc
Replies: 8
Views: 299

Re: Qc vs Kc

Q > K, system shifts left
Q < K, system shifts right
Q = K, system is at equilibrium, no shift in either direction
by chimerila
Sat Mar 14, 2020 8:32 pm
Forum: Student Social/Study Group
Topic: This is literally not time sensitive at all, but...
Replies: 2
Views: 106

This is literally not time sensitive at all, but...

I've always wondered what the point of endorsed posts was. I don't get it, are they just posts that the prof likes or thinks are useful?
by chimerila
Sat Mar 14, 2020 8:30 pm
Forum: General Rate Laws
Topic: Video help
Replies: 3
Views: 66

Re: Video help

Anything by the Organic Chemistry Tutor is bound to be good! (I love Hank Green, but his videos aren't heavy duty enough for that STEM grind)
by chimerila
Sat Mar 14, 2020 8:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Time
Replies: 13
Views: 197

Re: Final Exam Time

The test will be timed, Lavelle sent an email about it. It will be administered at the normal final time, with 30 min added for technical logistics, like logging in to CCLE. I've taken quizzes on CCLE before, and can confirm it WILL kick you out of the test when time is over. It will turn in whateve...
by chimerila
Sat Mar 14, 2020 8:23 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Change in Ecell
Replies: 3
Views: 31

Re: Change in Ecell

To my understanding, the mass of the cathode is increasing because the ions in the solution on the cathode side are being reduced, and these reduced molecules are attaching themselves to the cathode, therefore increasing its mass. So like if you had a cathode of Cu and it was in a solution of Cu+ i...
by chimerila
Sat Mar 14, 2020 8:21 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Change in Ecell
Replies: 3
Views: 31

Re: Change in Ecell

To my understanding, the mass of the cathode is increasing because the ions in the solution on the cathode side are being reduced, and these reduced molecules are attaching themselves to the cathode, therefore increasing its mass. So like if you had a cathode of Cu and it was in a solution of Cu+ io...
by chimerila
Sat Mar 14, 2020 8:13 pm
Forum: Balancing Redox Reactions
Topic: YouTube videos for Redox Reactions
Replies: 4
Views: 88

Re: YouTube videos for Redox Reactions

"Balancing Redox Reactions in Acidic and Basic Conditions" by Professor Dave Explains had a nice and simplified explanation that really helped. I'll paste the link. Hope this helps and good luck!! https://www.youtube.com/watch?v=N6ivvu6xlog&t=390s Thank you so much! I'll definitely ch...
by chimerila
Sat Mar 14, 2020 7:45 pm
Forum: Balancing Redox Reactions
Topic: YouTube videos for Redox Reactions
Replies: 4
Views: 88

YouTube videos for Redox Reactions

I'm still having trouble balancing these equations. I watched an Organic Chemistry Tutor vid on it, and it was helpful but I would love to watch/listen to more explanations. Anyone have any recommendations?
by chimerila
Sat Mar 14, 2020 7:42 pm
Forum: General Science Questions
Topic: Final Content
Replies: 5
Views: 106

Re: Final Content

i actually do think that there will be hw questions on the exam! it's on the syllabus that the final will include hw questions, and i don't think that is going to change just because it's online. Maybe with the numbers changed then, but the same question format and wording? I would agree that that'...
by chimerila
Sat Mar 14, 2020 7:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Conjugate Seesaw
Replies: 5
Views: 80

Re: Conjugate Seesaw

905415863 wrote:Conjugate seesaw has to do with conjugate acids and bases. A weak acid will have a strong conjugate base. A strong acid will have a weak conjugate base. You can see how this is metaphorically related to the idea of a seesaw.


yeah, it's more conceptual, not really as a means to derive a formula
by chimerila
Sat Mar 14, 2020 7:28 pm
Forum: General Science Questions
Topic: Final Content
Replies: 5
Views: 106

Re: Final Content

I would imagine the questions would be very close to hw questions / things we can feasibly complete. I don't think Lavelle would make it harder as he seems to be doing everything he can to make it fair and not super stressful for us. I would expect the same difficulty as the midterm. If he puts exac...
by chimerila
Sat Mar 14, 2020 7:26 pm
Forum: Van't Hoff Equation
Topic: Equation Sheet
Replies: 6
Views: 100

Re: Equation Sheet

When would we need to use that equation?
by chimerila
Sat Mar 14, 2020 6:45 pm
Forum: Administrative Questions and Class Announcements
Topic: ENDGAME Review Session
Replies: 71
Views: 2528

Re: ENDGAME Review Session

Seriously so helpful, Lyndon for the win
by chimerila
Sat Mar 14, 2020 6:38 pm
Forum: General Science Questions
Topic: Chemistry Final
Replies: 16
Views: 274

Re: Chemistry Final

I'm hoping its more MC than usual just because of the way we have to type our answers
by chimerila
Sat Mar 14, 2020 6:34 pm
Forum: General Science Questions
Topic: Who makes the Final
Replies: 23
Views: 287

Re: Who makes the Final

JosephineF wrote:
Jose Robles 1D wrote:Wait is the whole test going to be on CCLE now right?

I believe so yes


It's open on CCLE during the normal tie our final would be, with an additional 30 minutes for log in time/other things that might come up :)
by chimerila
Sat Mar 14, 2020 6:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem Community Posts Due Date
Replies: 13
Views: 238

Re: Chem Community Posts Due Date

BritneyP- 2c wrote:Last chem community post ever!


LOL, congrats! Good luck on the final :)
by chimerila
Sat Mar 14, 2020 6:21 pm
Forum: Student Social/Study Group
Topic: Thoughtful Poetry Time
Replies: 3
Views: 127

Re: Thoughtful Poetry Time

A 3 Haiku Poem Set on a Biology Major's Relationship with Chemistry

You are the bane of
My existence, but I need
You for med school, sigh

I appreciate
Your boundless application
But I'm not a fan

This is why I chose
To follow biology
Through my undergrad
by chimerila
Sat Mar 14, 2020 6:13 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: n in NFE
Replies: 19
Views: 138

Re: n in NFE

It can be kind of confusing, especially since I'm so used to seeing "n" and thinking "MOLES". But to help myself, I like to remember that we're using this equation when solving problems related to electrochemistry, so "n" actually signifies electrons. "E"lectr...
by chimerila
Sat Mar 14, 2020 6:02 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem Community Posts Due Date
Replies: 13
Views: 238

Chem Community Posts Due Date

Usually, Chem Community posts are due by Sunday. But since our final is tmr, should we make sure we have all our posts done by tonight, before the final, or by the end of tmr like usual?
by chimerila
Sat Mar 14, 2020 5:58 pm
Forum: Student Social/Study Group
Topic: Curve?
Replies: 31
Views: 1154

Re: Curve?

Whatever happens, you'll pass the class if you get 250/500. Anything more than that, your grade is calculated based on how the rest of the class does. But the curve can only help you
by chimerila
Sat Mar 14, 2020 5:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Final- general questions
Replies: 12
Views: 127

Re: Final- general questions

I am getting a little anxious because I do not know general details about this final. What is the exact time limit? How are we going to be tested, is it all online and are we using zoom/video recording site while taking the test? How is the test formatted? I just feel like I do not know all the inf...
by chimerila
Sat Mar 14, 2020 5:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 275
Views: 130231

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle, It's very apparent that you are passionate about the subject you teach and truly care about your students success. These are both very admirable traits in an educator, and I'm glad I had the privilege to take your class. Thank you for continuing to work with us undergrads as changes occ...
by chimerila
Sat Mar 14, 2020 5:42 pm
Forum: Administrative Questions and Class Announcements
Topic: final exam - question
Replies: 6
Views: 169

Re: final exam - question

I feel like it will be based on final answers only, as he said he was looking for options that would not require us to upload pictures or additional files. But tbh that kind of stresses me out...I love partial credit. This situation just sucks, and it's not anyone's fault. :( thanks to Dr. Lavelle f...
by chimerila
Sat Mar 14, 2020 5:35 pm
Forum: Student Social/Study Group
Topic: Coronavirus Joke
Replies: 14
Views: 536

Re: Coronavirus Joke

HAHA, I didn't know where this was going but I like it
by chimerila
Fri Mar 06, 2020 12:58 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Potentials
Replies: 4
Views: 58

Re: Standard Potentials

Daria Azizad 1K wrote:They are based on the reaction with the standard hydrogen electrode.



Is that like...super important to know, or just a detail?
by chimerila
Fri Mar 06, 2020 12:56 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Favoring reactions
Replies: 7
Views: 71

Re: Favoring reactions

For nonstandard cell potentials, looking at the proportions of products and reactants when calculating Q can also help you determine which direction the reaction favors. For example, if Q is a large number (so there would be a lot of product in proportion to reactants), it would be a product favored...
by chimerila
Fri Mar 06, 2020 12:51 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Concentration Cells
Replies: 5
Views: 65

Re: Concentration Cells

So concentration cells always have a standard potential of 0V?
by chimerila
Thu Mar 05, 2020 9:46 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6M.1
Replies: 1
Views: 47

Re: 6M.1

https://lavelle.chem.ucla.edu/forum/viewtopic.php?t=11592

I was also confused by this, since the solution manual rewrites the cell notation, but hopefully this helps!
by chimerila
Wed Feb 12, 2020 3:26 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Multistep reactions
Replies: 6
Views: 89

Re: Multistep reactions

For the problem given it's not a multistep reaction. In fact, you are asked to manipulate the K of the given chemical reaction to find the other K values. For example A since the reaction is reversed you would find the inverse of the given K to find the new K value for the new reaction. Ahhh, I see...
by chimerila
Wed Feb 12, 2020 1:32 am
Forum: Calculating Work of Expansion
Topic: Midterm equation sheet
Replies: 16
Views: 163

Re: Midterm equation sheet

Megan Kirschner wrote:Yes, it's the same.

I often find it helpful to cross out the equations we don't know anything about- so the equations sheet is less overwhelming.


That's such a smart idea
by chimerila
Wed Feb 12, 2020 1:15 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Multistep reactions
Replies: 6
Views: 89

Re: Multistep reactions

I also wonder the same thing about 5H.3, as that problem seems to be requiring a similar method to solve it. Any clarification on this would be greatly appreciated "Use the information in Table 5G.2 to determine the value of K at 300 K for the reaction 2 BrCl(g) + H2(g) = Br2(g) + 2 HCl(g).&quo...
by chimerila
Wed Feb 12, 2020 1:06 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Multistep reactions
Replies: 6
Views: 89

Re: Multistep reactions

Not to question the all knowing ChemMod (mad respect), but there's a homework problem in the syllabus that is as follows: "For the reaction N2(g) + 3 H2(g) = 2 NH3(g) at 400. K, K = 41. Find the value of K for each of the following reactions at the same temperature: (a) 2 NH3(g) = N2(g) + 3 H2(...
by chimerila
Sun Feb 09, 2020 5:40 pm
Forum: Student Social/Study Group
Topic: Lost Stylus @ Pizza Rolls session
Replies: 1
Views: 72

Lost Stylus @ Pizza Rolls session

Hey y’all, I lost my little Adonit stylus at the review session. It’s a two part stylus that screws together, and the stylus tip has a little clear disk. One part of it is blue and the other is silver/gray. I was sitting in the back middle section, and it must of fell out of my lap when I stood up a...
by chimerila
Sat Feb 08, 2020 11:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Grading
Replies: 7
Views: 87

Re: Grading

You need a 50% to pass the class with a C-. The other letter grades are determined by the class average. Do you need a 50% in each assignment category to pass the class with a C-? Or a 50% in general. My TA made it sound like it was the former, which is kind of worrisome since I did so bad on the f...
by chimerila
Sat Feb 08, 2020 11:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 1 Distribution
Replies: 9
Views: 129

Re: Test 1 Distribution

I guess Lavelle looks at everything at the end and establishes the grade scale. If it makes you feel any better though, I got less than a 50% on the first test, so if you got better than that I think you're doing okay lol. And if you're in the same boat I'm in, let's do our best!
by chimerila
Sat Feb 08, 2020 10:57 pm
Forum: Administrative Questions and Class Announcements
Topic: Pizza Rolls REVIEW Session DOWNLOAD HERE
Replies: 67
Views: 2646

Re: Pizza Rolls REVIEW Session DOWNLOAD HERE

Thanks so much! Love the little funnies throughout the problem sets. If we have a good understanding of the concepts on this practice exam, do you think we're at a good place for the test?
by chimerila
Sun Jan 26, 2020 11:40 pm
Forum: Student Social/Study Group
Topic: Office Hours
Replies: 5
Views: 154

Re: Office Hours

JesseAuLec1Dis1G wrote:I haven't. But the UA sessions can be very helpful!


Are all the UA sessions the same? Or do they give out different worksheets?
by chimerila
Sun Jan 26, 2020 11:38 pm
Forum: Student Social/Study Group
Topic: Study websites besides quizlet
Replies: 3
Views: 135

Re: Study websites besides quizlet

I heard StudyBlue is a good one! It's an app where you can find premade study sets for various course. You can track your progress on correct answers like on quizlet
by chimerila
Sun Jan 26, 2020 11:32 pm
Forum: Student Social/Study Group
Topic: Class Grading
Replies: 44
Views: 1705

Re: Class Grading

I think when he says there isn't a curve he means a bell curve, meaning there isn't a specific grade distribution he wants. But it does seem like he will be curving the class, or not using a standard grading scale. This way if the overall grades aren't very high, he will shift the cutoffs so that p...
by chimerila
Sun Jan 26, 2020 11:27 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1213856

Re: Post All Chemistry Jokes Here

Be like a proton and stay positive, folks :)
by chimerila
Sun Jan 26, 2020 11:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1213856

Re: Post All Chemistry Jokes Here

For all my bilinguals out there:

Is Silicone the same in Spanish?
.
.
.
Si.
by chimerila
Sun Jan 26, 2020 11:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Test
Replies: 2
Views: 33

Practice Test

This is my first time having Lavelle. Does he give out practice tests like some professors do? I'm pretty sure the other resources will be enough to prepare for exams, but I was curious if he does this as well. Thanks!
by chimerila
Fri Jan 17, 2020 12:58 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 6B.3 PART B HELP
Replies: 4
Views: 96

Re: 6B.3 PART B HELP

For part B, the solution has been diluted due to the mistake made by the technician, so in order to solve for the pH, you would need to know the new concentration of the solution. To find that, you need to use the dilution equation: M 1 V 1 =M 2 V 2 . Interesting, it didn't cross my mind to use tha...
by chimerila
Fri Jan 17, 2020 12:57 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 6B.3 PART B HELP
Replies: 4
Views: 96

Re: 6B.3 PART B HELP

Chem_Mod wrote:You first need to multiple .025M by the volume 200.0mL (or .200L), not divide. You want to multiply so you get the number of moles, which you can then divide by the new volume to find mol/L.


Ahhh, I see, I'll try that, thank you!
by chimerila
Thu Jan 16, 2020 10:44 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 6B.3 PART B HELP
Replies: 4
Views: 96

6B.3 PART B HELP

Question : A careless laboratory technician wants to prepare 200.0 mL of a 0.025 m HCl(aq) solution but uses a volumetric flask of volume 250.0 mL by mistake. (a) What would the pH of the desired solution have been? (b) What will be the actual pH of the solution as prepared? I solved the second part...

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