CHEMISTRY COMMUNITY

Sunia Akaveka 4I

How do you identify which base is stronger or which acid is stronger when given two bases/acids?

Sunia Akaveka 4I

Does anyone know roughly how many points are needed for grades above C-? Like what is needed for C, C+, B-, B, B+, A-, A, and A+?

Sunia Akaveka 4I

Whenever I look at the chemical names given in the homework problems, they always overwhelm me! Can someone please give me some tips on how to easily name chemicals such as the ones in problems like 9C.1 and 9C.3

Sunia Akaveka 4I

Review the problems you got marked off on from the midterm, do the homework problems for concepts you don't quite understand (I would recommend to do all to really expose yourself to many test question possibilities), and do the activities on SaplingLearning Plus

Sunia Akaveka 4I

I agree with Alex. So, I think it would be helpful to study the newer material as well as material that Lavelle withheld from the midterm, such as Heisenberg uncertainty.

Sunia Akaveka 4I

I'm almost 99% sure that the Test Bank isn't allowed to take Lavelle's tests. Thus, there would be no previous exams for this class there. I think the best legal option is to do Lyndon's Marshmallow review since they're inspired on previous test questions. But, the illegal option is to probably ask ...

Sunia Akaveka 4I

I'd say definitely go over the midterm solutions (especially problems you got marked off), this will give you an idea of what test concepts you didn't quite understand! Also, you should study the concepts we didn't cover in the midterm, because I lowkey feel like Dr. Lavelle is the type of professor...

Sunia Akaveka 4I

I think there is an obvious higher level of difficulty for students who haven't taken AP Chemistry. This class has me beyond stressed compared to my other classes! However, I make this assumption loosely based on my experience in my calculus class I'm also taking this quarter. My experience in that ...

Sunia Akaveka 4I

Honestly, whenever I read the textbook I get more confused! So I'd honestly just recommend working out every assigned homework problem in the Outlines on Lavelle's website. Also, for each problem it's important to understand how to solve those problems, why certain equations are used, and the genera...

Sunia Akaveka 4I

How exactly do you determine if a molecule is polar or nonpolar? I understand it mainly regards to dipoles canceling out or not, but can anybody elucidate this concept, I'm not quite fully understanding. Thanks!

Sunia Akaveka 4I

Hi, I'm still a bit confused about how you know which intermolecular forces are involved given just the chemical formula. Can someone explain this to me? (For reference, I'm talking in regards to problems like 3F.1 and 3F.2)

Sunia Akaveka 4I

3F.4-3F.5, also the topics on Lavelle's Outline 4: Molecular Shape and Structure, that doesn't include hybridization (up to sigma/pi bonds).

Sunia Akaveka 4I

That's what I was wondering too! Like I kept up with the 5 questions a week, but how is this monitored?

Sunia Akaveka 4I

I believe it's very possible that we'll be asked to reproduce the A-X-E notation, especially since Lavelle writes it out almost each time he does an example in lecture!

Sunia Akaveka 4I

I don't have an answer but WOW that's crazy how it just skipped it and it isn't part of Lavelle's solution manual error resource on his website! Nice catch lol

Sunia Akaveka 4I

When it comes to molecular shapes and shapes with the presence of lone pairs, does anyone have helpful pneumonics or techniques to memorize the many shapes?

Sunia Akaveka 4I

What I noted is that you should be able to tell when the bond angles are less than the expected (i.e. less than 109.5 deg in the example you give), but it is also helpful to be able to rank them when comparing various shapes, such as the bond angles on a molecule with one lone pair against a molecu...

Sunia Akaveka 4I

I might have missed when he said it, but did Lavelle specify if we're allowed to just write that bond angles in the presence of a lone pair are just less than their normal measure? For instance, a tetrahedral with two lone pairs, can we just write the bond angles as less than 109.5 degrees? Or would...

Sunia Akaveka 4I

As this class progresses, I'm seeing more and more students succeed depending on the homework problems they expose themselves to. So for the final, I plan to work on many different problems! Also, something that gave me trouble (among many others) during the midterm, were solving problems given only...

Sunia Akaveka 4I

Does anybody know if Test 2 will resemble the midterm or the first test more? I know Lavelle said that the midterm and tests subsequent to it will be significantly harder, but I'm wondering more in terms of test 2 having conceptual questions that pair with calculation based questions like the midter...

Sunia Akaveka 4I

Kendra Barreras 3E wrote:So for the 2nd test there will only be material from after the midterm?

Sorry, I am just seeing this reply but yes, the Test 2 is only on material after the midterm and the dipole interactions Lavelle taught right before our midterm.

Sunia Akaveka 4I

As a commuter, I’m finding it pretty hard to really prepare for tests in this course (as it’s very difficult for me to attend review sessions/office hours with my schedule). I know this is very dependent on when I’m available, but do any of you commuters out there have any general advice to spare? A...

Sunia Akaveka 4I

Hypothetically, if a chemistry test in this class had a problem where you had to find the wavelength from just the provided work function value, what would you do? This TOTALLY didn’t give me a hard time on a chem test or anything hahaha jk...unless?

Sunia Akaveka 4I

*By the way, I mean a problem like that in general, I’m not asking for the specific answer from the midterm... lol I feel like it’s illegal to talk about the test answers. #APExamVibez

Sunia Akaveka 4I

Hi, On the midterm, there was a question asking about the excitement of an atom to a different principle quantum number. And I was just wondering if anyone could please walk me through the equation used to find an answer for a problem like that and what steps we’d take to find the solution. This pro...

Sunia Akaveka 4I

Also, does anyone know when the test will take place?

Sunia Akaveka 4I

Does anyone know what the next test in our discussion sections will cover?

Sunia Akaveka 4I

Dipoles are not on the midterm as they are apart of the 3F unit, and our midterm is only cumulative of units up to 2D.

Sunia Akaveka 4I

Is the midterm going to be all free-response problems using calculations or will there be other types like multiple choice, true/false, etc.?

Sunia Akaveka 4I

Hi, I have been practicing a lot of problems lately and I realized that whenever I calculate things like the Heisenberg uncertainty equation, I always get the wrong answer using my TI-30XIIS calculator. My calculator is set to SCI and DEG, yet I still get answers incorrect! However, when I check my ...

Sunia Akaveka 4I

I believe 1D.3 is not a part of our recommended homework problems. Thus, we will not be expected to reproduce problems outside of the recommended homework problems and what Dr. Lavelle covers in lecture. I hope this helps.

Sunia Akaveka 4I

Just to clarify, the topics with an asterick (*) such as Particle in Box, Black Body, etc. are not going to be tested, correct?

Sunia Akaveka 4I

This might be a silly question but which equation did Dr. Lavelle prefer us to use instead of the Rydberg? I want to know which to study. Thanks

Sunia Akaveka 4I

Does anybody know if we're gonna be expected to know the specific wavelengths in nm for the midterm? Like for example, we're given a problem to solve for the wavelength then we have to say which type of radiation it is or maybe even which color the wavelength represents?

Sunia Akaveka 4I

Hi,
Does anybody know if we get the same exact list of constants/equations, and the same periodic table for every test we take? I've been practicing with the copies given during Test 1 and I want to know if it'll be the same!

Sunia Akaveka 4I

Hey! I got an email about it, but it made it seem like everyone needs to trade in the code sleeve at the UCLA store? Do you know if this only applies to the people that SaplingLearning doesn't work for? Or should we all be trading in the code sleeve because SaplingLearning will be inactive after Oc...

Sunia Akaveka 4I

Midterm is November 6th and I believe we are being assorted into specific classrooms depending on lecture and last name. Don't forget to bring typical materials for testing and an ID!

Sunia Akaveka 4I

Everything from outline 1 to outline 3! Unless there were any changes due to our one cancelled lecture!

Sunia Akaveka 4I

Blue books are not needed for the midterm.

Sunia Akaveka 4I

I believe everything up to the topics covered in Outline 3.

Sunia Akaveka 4I

Hey! I got an email about it, but it made it seem like everyone needs to trade in the code sleeve at the UCLA store? Do you know if this only applies to the people that SaplingLearning doesn't work for? Or should we all be trading in the code sleeve because SaplingLearning will be inactive after Oct...

Sunia Akaveka 4I

According to a document I found through Lavelle’s website, I believe the midterm will cover up to Outline 3.

Sunia Akaveka 4I

I believe Lavelle announced that the modules were only for the first outline and some of the Quantum unit since it has the most content.

Sunia Akaveka 4I

On Lavelle’s website there’s a midterm subheader lower on the page that directs where students go to take their midterm based on last name and lecture. As for the test, the document from the midterm subheader said the test is 120 minutes, 8 questions. The document elaborates a bit further.

Sunia Akaveka 4I

Does anyone know how we’re being graded in this course? It is to my understanding that 50% of all 500 points is a C- but what are the ranges for ‘B’ grades? ‘A’ grades?

Sunia Akaveka 4I

I was wondering if anybody has any really helpful study tips for this class. I know that reading the textbook is one of the most helpful study methods but can anyone suggest anything other than this?

Sunia Akaveka 4I

In the Midterm review/exam schedule section on Lavelle’s website, it says that test questions are from homework and online assessments. That being said, will the questions actually be taken directly from the pool of assigned homework problems? Or are they just similar?

Sunia Akaveka 4I

I believe the equation used was (hc/E)=λ, E is found from the answer to part b, h is Planck's constant, and c is represented by 2.99792 x 10^8.

Sunia Akaveka 4I

In my personal experience, I post in the topic that's most related, but I saw that someone posed a question regarding the Rydberg equation in the announcement section! But if you cannot find the topic that's most related, I would just post it in a section that's faintly similar because I know some p...

Sunia Akaveka 4I

In general, the periodic table has the following trends for atomic radius: As you move down a column, atomic radius increases. As you move from left to right along a row, the atomic radius decreases. Wait, actually that sounds very familiar and I think I knew that subconsciously. Hahah thanks! But ...

Sunia Akaveka 4I

This could be such a basic question but how do you find atomic radius? To be honest, I looked at the solutions manual (specifically for 1F.1 where it asks to list the elements in order of decreasing atomic radius) and still don't understand how the measurement is obtained. Anything helps, thanks!

Sunia Akaveka 4I

My understanding of chemistry. That's it. That's the joke.

Sunia Akaveka 4I

I'll keep my eye out for it. I hope it finds you well.

Sunia Akaveka 4I

I'm pretty sure it is graded on how many points out of 50 we get on the test. But if not, I think the test is out of 40 points and we get 10 points for being there? I heard from my friend who took chem 14a last year that her test was out of 40 points. Can anyone confirm this distribution of 10 poin...

Sunia Akaveka 4I

As mentioned above, YouTube is a great place for extra explanations on the chemistry topics covered. Organic Chemistry Tutor, The Chemistry Solution, and some of the Conquer Chemistry videos are really helpful!

Sunia Akaveka 4I

I know that for test and exams, we're given a score, but our quarter grade depends on the summation of all test/exam scores and the class average score. So I'm assuming we won't truly know until the final exam scores are released, which is kinda scary to think about. But, I could be wrong. I'm just ...

Sunia Akaveka 4I

That is a great question! How are we graded on our number of posts if we posted more than the necessary amount in a previous week? Does it carry over?

Sunia Akaveka 4I

Hi all,
Does anyone know how the first test is graded? I know it's out of 50 points, but I'm a bit confused on the whole "you get a point for each minute" since obviously the tests are graded on correctness and work to show answers.

Sunia Akaveka 4I

I think it's an error in the textbook, because oddly the solution manual lists the reactant as Fe3Br8. Nice catch!

Sunia Akaveka 4I

I believe the homework is turned into our discussion sections, since the TA's are responsible for the grading of each assignment, test, etc.

Sunia Akaveka 4I

You're not alone! I actually know quite a few people, myself included, who lost their chemistry with chemistry. That was a horrible joke but you know what I mean!

Sunia Akaveka 4I

Putting .0014 units into the scientific notation of 1.4 x 10^-3 would better adhere to the rules of sig figs, as the zeros in .0014 are not significant. But, I think these also mostly depend on the number with the least amount of sig figs displayed in the problem itself.

Sunia Akaveka 4I

It's one of those additions in the problem that tries to trick you and test your knowledge on what's the appropriate course of action when solving the problem.

Sunia Akaveka 4I

When we take tests, finals, etc. will we have access to a periodic table and formulas necessary for the problems on the testing material?
This may or may not have been mentioned during the lecture, but sometimes I'm so deep in note-taking I forget to actually process the words being said.

Sunia Akaveka 4I

My high school chemistry teacher would make us practice balancing equations by handwriting each individual element appearing in both the reactants and products sides and how many moles each had (it can be a lot of work, but it can potentially ease you into balancing). For instance in the case of Fe2...

Sunia Akaveka 4I

So, if this 0.004g is lost to discrepancy or for rounding purposes, wouldn’t this further our mass percentage composition data from accuracy? Would this be more considered precision?

Sunia Akaveka 4I

In the example given in class regarding 8.00g of Vitamin C, where the carbon amounted to 3.27g, hydrogen amounted to 0.366g, and oxygen was 4.36g, Dr. Lavelle emphasized the importance of double-checking that the sum of these amounts equal to the 8.00g. When adding these, you receive a total of 7.99...

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