CHEMISTRY COMMUNITY

Jasmine Yi 1G

Yes, calculators are allowed. Last time, we had plenty of time to show our TA what calculator we were using, so don't worry about it too much! If you're stressed about it, it wouldn't hurt to prep a back up.

Jasmine Yi 1G

Obviously, it's not ideal to study everything in one day. And like other people said, if it's possible, you should try to split it up over a few days. But if you really don't have time to study until the day before the exam, I recommend studying in short intense bursts. Each "burst" should...

Jasmine Yi 1G

50 points if this is the first time you had Lavelle, 100 points if you had Lavelle for 14a!

Jasmine Yi 1G

Criminal minds is good to binge, but if you watch kdramas, extracurricular was pretty good! Both are on Netflix.

Jasmine Yi 1G

If the university allows us to move in, I definitely want to move in.

Jasmine Yi 1G

I can't believe we're in the last stretch of this quarter O.O

Jasmine Yi 1G

Definitely do textbook problems!

Jasmine Yi 1G

I'm definitely looking forward to exploring the campus and joining clubs! I've never really been to the actual campus yet because of the pandemic ;-;

Jasmine Yi 1G

I've been getting into bibi, if anyone wants to check her out, then I recommend starting with a song called binu!

Jasmine Yi 1G

The topics seemed proportional to what how much time we spent on each topic during the quarter, but as some of the other people said, acids and bases felt kind of like an exception. Hope that helps!

Jasmine Yi 1G

If you can't go to all the workshops, then at least try to get notes or worksheets from people that did! It's nice to see the same topic reviewed with different explanations, but it can get hard to go to everything since you also have to review for other classes.

Jasmine Yi 1G

I definitely recommend reviewing to the point that you feel like you've "over reviewed". And then review some more.

Jasmine Yi 1G

Gwirnowski 3B wrote:You can never go wrong with the Percy Jackson or the Heroes of Olympus series.

Ooh I almost completely forgot about the Percy Jackson series. I feel like I have to reread it now.

Jasmine Yi 1G

TiffanyBrownfield 2I wrote:Personally, I love most desserts that have cinnamon in them. I find myself craving churros, cinnamon rolls, and/or cinnamon cookies quite frequently.

Oh man cinnamon rolls sound really good right about now...

Jasmine Yi 1G

I've been craving ice cream all week but I keep forgetting to buy some :(

Jasmine Yi 1G

I think it should be proctored similarly.

Jasmine Yi 1G

Weeks 4-6

Jasmine Yi 1G

I feel like you end up having to know the entire outline in order to solve the problems from the part of the outline that will be on the midterm because a lot of the concepts connect, but technically, you only have to know the specified parts of the outline.

Jasmine Yi 1G

Yeah, I feel a lot of pressure to do well because I didn't do so well on the first midterm, but I feel like I'm really struggling with the material.

Jasmine Yi 1G

Thank you so much! This was really helpful.

Jasmine Yi 1G

I'm planning on taking chem 14bl, a prereq for my major, and probably a ge.

Jasmine Yi 1G

I feel like it's hard to find a balance between resting enough so your body can recover from working and resting so much that you're wasting time. I'm constantly struggling to find the balance, but I think that as long as you're keeping in mind that you should be looking for this balance, it's all g...

Jasmine Yi 1G

I've lost a lot motivation for studying, but seeing all these tips have motivated me in a weird way. I've never heard of the pomodoro technique before, but there seems to be a lot of vouchers, so I think I'll try it!

Jasmine Yi 1G

I just finished the first season of The Promised Neverland and I have... mixed feelings.

Jasmine Yi 1G

Kaili Valenzuela 2B wrote:I'm currently obsessed with Criminal Minds!

Ahh i loved criminal minds!

Jasmine Yi 1G

Hello! Something I find really helpful is really just going through the textbook and assigned readings. The textbook really breaks down the different equations, which is something I struggle with. Going through the example boxes and making sure you understand everything that is being done is super ...

Jasmine Yi 1G

im in 20L which is the lab section for the 20 series so im not sure if theyre structured the same but heres my 2 cents: if you LIKE doing labs/hands on things and experiments because you think they're FUN then that would probably be your biggest incentive to wait till in person. however if you dont...

Jasmine Yi 1G

Thank you for the tips! I'm definitely gonna be using these.

Jasmine Yi 1G

You can try Sweet home if you haven't yet. I thought it was pretty good. Ahhhh vouch!! This one is another kdrama based on a webtoon with the same name. The webtoon was insanely good and even though the kdrama changed some key details, I think it added to the plot, so it was okay. The special effec...

Jasmine Yi 1G

I wanted to vouch for some of the dramas that nadya listed because some of my favorites are on there hehe Moonlight Drawn By Clouds: Really cute, but it's a historical drama, which means its set a few hundred years ago and there's a king, and everyone is wearing traditional clothing. So it might be ...

Jasmine Yi 1G

Post midterm anxiety definitely hit hard but I feel a lot better after finally taking a break from studying. So if anyone is still stressing, give yourself a break. You deserve it!

Jasmine Yi 1G

I don't know why but it feels really reassuring that I'm not the only one that finds it hard to absorb info from reading the textbook. I think I'll try to change my study habits instead of forcing myself to spend all my time reading the textbook just because it feels like that's how everyone else is...

Jasmine Yi 1G

It probably varies from person to person, but I think I spend more than 16 hours per week because chem is a harder subject for me. But if you have a lot of experience with chem and you're familiar with the concepts, then you probably don't need to invest as much time.

Jasmine Yi 1G

Last quarter, it took about a week, but just like someone else mentioned, the professor sent out an email, so you don't have to worry about remembering to check for your grade.

Jasmine Yi 1G

Lofi remixes of pokemon sound tracks are pretty nice

Jasmine Yi 1G

My TA said that everyone that is in the same lecture might be in the same zoom call during the final, not sure if this is still how they're planning on doing it, but thought people might wanna know.

Jasmine Yi 1G

Stronger acids dissociate completely, so larger Ka probably correlates to stronger acids.

Jasmine Yi 1G

The ideal gas law can be used to help figure out which way the equilibrium will shift. For example, if the pressure of a container is decreased, that can also be interpreted as an increase in the volume because P and V are inversely proportional. And if the volume is increasing, the concentration i...

Jasmine Yi 1G

This also really confused me, but after reading this, I think PV=nRT relates to equilibrium because some changes will affect volume, which affects concentration.

Jasmine Yi 1G

Yes, Kp is for gases

Jasmine Yi 1G

They weren't very strict on calculators last quarter, so I'm assuming that they'll have similar policies this quarter until we're told differently.

Jasmine Yi 1G

Judging off of our midterms from last quarter, I think it is possible that specific sections of outline 3 might be tested, but I'm sure we'll be told in advance.

Jasmine Yi 1G

Yeah, if H2O is a gas, then it's included in the ICE table and all other calculations. But if it is in any other state, then it is excluded.

Jasmine Yi 1G

Ah I was hoping that there would be a better way to keep track than doing it manually, but it seems like everyone's been doing it manually. :(

Jasmine Yi 1G

not a movie, but i love the great british baking show. it's technically a competition show, but it's been so chill so far and i like seeing all the pretty stuff people make!

Jasmine Yi 1G

I think it's easier to think of it as a square vs rectangle thing. All squares are rectangles but not all rectangles are squares. In the same way, only one value of Q is equal to K, and that is at equilibrium. Not sure if that makes sense, but hope it helps.

Jasmine Yi 1G

Both Kc and Kp ask for values at equilibrium, but Kc asks for molarity and Kp asks for partial pressure.

Jasmine Yi 1G

Just wanted to add on and say that my ta said that reactions rarely ever "finish" or stop reacting, they just reach an equilibrium point. I thought that this made this concept make a lot more sense when I heard it.

Jasmine Yi 1G

Yep! Kc uses molarity.

Jasmine Yi 1G

You can ask or answer any chemistry related question, but you can also ask/answer things that aren't about chemistry! i think one of the more memorable posts from last quarter was one asking for tv show recommendations.

Jasmine Yi 1G

Seems like it would be a good idea to just review the textbook questions we've done so far.

Jasmine Yi 1G

I try to take breaks and remind myself that being too stressed will probably hurt my grades rather than help it.

Jasmine Yi 1G

I've heard similar stuff from my TA, seems like looking at textbook problems will really help for the final.

Jasmine Yi 1G

I've been looking at the homework we've done. So sapling and textbook problems.

Jasmine Yi 1G

Good luck to everyone!

Jasmine Yi 1G

In the Week 10 review session pdf it said the final would be weighted based on how much time we spent on each unit, so I don’t think there will be a super large focus only on the last units. I think he said that the quantum unit was the longest so we should expect more questions from that section. ...

Jasmine Yi 1G

Chelsea_Guzman_1B wrote:Looking over the textbook problems might be helpful for studying. However, it didn't really help for the last midterm, but hopefully this final goes better!

I agree, I felt like the textbook problems were different from the material tested on the midterm.

Jasmine Yi 1G

Finals season is a lot more intense than I thought it would be, hopefully I'm prepared.

Jasmine Yi 1G

I'm worried that I don't remember enough of the stuff we learned in the beginning of the quarter and I'll have a hard time reviewing for the final. But hopefully all the extra review sessions will help.

Jasmine Yi 1G

I think Lavelle did say that we are graded on participation.

Jasmine Yi 1G

I hope he answers this soon, I didn't realize that this class was curved like this and I'm a little confused now.

Jasmine Yi 1G

On finals week, I believe we don't have class or discussion (I'm not completely sure). But our final is on Sunday, December 13 from 11:30am-2:30pm (this is on myUCLA, you can find the times for the finals for all your classes there). I'm sure in the next couple of weeks Dr. Lavelle will explain how...

Jasmine Yi 1G

I know this sounds weird, but studying on the floor occasionally has helped. It definitely changes your environment, even though you're still in the same house.

Jasmine Yi 1G

Marco Vivar 3G wrote:My favorite tv show to watch on Netflix is Avatar The Last Airbender. I know this show is popular but it has so much rewatchability!

I love rewatching Avatar the Last Airbender! It's also nice to rewatch with friends haha

Jasmine Yi 1G

Seraphina Joseph 1C wrote:Khan Academy has some little quizzes with practice problems from some of the units we learned. I like to use them because they give an explanation to why you answered the question wrong

Vouch! Khan Academy has been pretty helpful.

Jasmine Yi 1G

alebenavides wrote:if you go to myucla u can access all ur grades for all ur classes :)

Thank you so much! This really helped.

Jasmine Yi 1G

Seems like it's due next week, not today. Hope that helps!

Jasmine Yi 1G

I think I also remember Lavelle saying that the final will be cumulative.

Jasmine Yi 1G

Leyna Tran 2D wrote:I felt the same way, but it will be okay! we can learn from our mistakes for future tests. we got this!

Aww this mindset is so nice and positive. I definitely agree, we can learn from our mistakes. And that's gonna be important for the final.

Jasmine Yi 1G

Nane Onanyan 1H wrote:Learning the choreo for "I Cant Stop Me" by twice B)

Ahh I love that so much. I love the choreo for the song and I wish I could learn it, but it's so hard ;-;

Jasmine Yi 1G

I don't know if this will work for everyone, but I like to bring chocolate to my tests. Whenever I get nervous, I eat a little bit of it. It helps me stop thinking about the test and getting anxious. If you don't have chocolate, I've found that anything minty helps too.

Jasmine Yi 1G

I've been liking Criminal Minds. I know it's an old show, but I started it recently. Avatar the Last Airbender is really good too!

Jasmine Yi 1G

Hi! What I found super helpful is practice! I like going through all the recommended textbook problems. The UA workshops were also so invaluable and helpful. It's a great way to test what you know and have even more problems to practice later! In addition, I also handwrite my notes so when it comes...

Jasmine Yi 1G

Yeah, definitely also feeling a little bit anxious. It's kind of reassuring to see that I'm not alone in feeling like this though.

Jasmine Yi 1G

cady_tran_2G wrote:I believe so! I might be wrong but I think Midterm 2 should cover the last of outline 2 and some of outline 3.

does this mean that Midterm2 doesn't cover all of outline 3?

Jasmine Yi 1G

It can also help when you always think of trends in terms of which directions they increase in. At least, that's how I memorized them. Hope that helps!

Jasmine Yi 1G

I believe that ionic bonds transfer electrons but the atoms remain bonded due to the resulting difference in charge between the two atoms.

Jasmine Yi 1G

I think it helps to think that the electrons that are furthest from the nucleus get taken away first.

Jasmine Yi 1G

It seems like the sapling for this unit is due on the Sunday of week 6, so we have more than a week left.

Jasmine Yi 1G

Can anyone review the actual midterm? Like, see which problems they got wrong.

Jasmine Yi 1G

Thank you so much!

Jasmine Yi 1G

Sophia Wendin 2B wrote:Anions usually have a bigger radius than cations/the parent element because there's more electron repulsion, and cations have smaller ionic radii because there's less repulsion and Rb+ would have no electrons in the n=5 energy level.

Will anions always be larger than neutral atoms?

Jasmine Yi 1G

Actually I dont think you need the wavelength equation. Just do e=(c/wavelength)*plancks to figure out the energy of the photon, convert that to eV by dividing 1.602e-19 and you're good Just making sure, we have to do the conversion because e=(c/wavelength)*plancks gives us an answer in joules, rig...

Jasmine Yi 1G

Can someone explain what a diffraction pattern is exactly? Hi Lily, A diffraction pattern is a pattern that is caused by a wave. It usually looks like a bunch of straight lines. These straight lines ocur because waves can interfere with each other and cause them to "cancel" out or amplify...

Jasmine Yi 1G

The question says: The E.Coli bacterium is about 2.2 μm long. Suppose you want to study it using photons of that wavelength or electrons having that de Broglie wavelength. What is the energy E photon of the photon? What is the energy E electron of the electron? I'm not sure how to start the problem....

Jasmine Yi 1G

The negative represents the energy lost, it doesn't imply that the energy itself is negative.

Jasmine Yi 1G

The negative sign causes your answer to be negative, representing the energy that the electron lost. When you use En for other stuff, you still have to use the absolute value of it because energy isn't negative.

Jasmine Yi 1G

This is a general question on the course; I just wasn't sure where to ask. Will we be given an equation and mathematical constant sheet for the midterm and final exams, or should I remember all the equations and constants we have learned in these units so far? My TA has said that Lavelle intends on...

Jasmine Yi 1G

If polarizability increases as an atom gets larger, would it follow the atomic radius trends? As in, increasing as you go down and left on the periodic table? Or is it a separate trend?

Jasmine Yi 1G

A tip I have would be to look for any unpaired electrons that are in lower levels. Hope that helps!

Jasmine Yi 1G

I think that you can think of the equation as representing a relationship that scientists have observed. If you change the equation, it would imply a different relationship. So, you can't change the equation itself.

Jasmine Yi 1G

In general, the Uncertainty Equation will give you delta momentum, which will give you delta velocity. You can use the delta velocity to find kinetic energy because kinetic energy = 0.5(m)(v^2). Remembering this general pathway can help in figuring out what direction to go. Hope this helps!

Jasmine Yi 1G

I think that, technically, there isn't a minimum speed for electrons (I could be wrong). However, electrons can't be faster than the speed of light.

Jasmine Yi 1G

The answer above is really detailed, but I just wanted to add a summary. The photons in light are particles. Light acts as a wave and a particle.

Jasmine Yi 1G

I wanted to add on that the reason you can't use f=ma for quantum world calculations is that when you measure electrons, you affect them. If you know the exact position, then you will affect their momentum, and vice versa. This is the Uncertainty Principle. So, an equation like f=ma that requires ex...

Jasmine Yi 1G

Hey, just wanted to add a tip that it's easier to think about moles if u think about doing the same thing, but with "dozens". For example, finding how many "dozens" of people live on Earth can help in thinking about the steps you'll need to take because, once you know the theoret...

Jasmine Yi 1G

I don't think anyone mentioned it here, but the professor has a periodic table on his website. It's free, and since it's on his website, I'm pretty sure that he would accept answers that use the values from that periodic table. In general, I wouldn't round values for molar mass because it could lead...

Jasmine Yi 1G

I agree with the answer posted above, but just to answer the post's specific question, ratios should be whole numbers. Whenever you get a ratio that has decimals, it is either a sign that you should round or multiply/divide by a factor in order to get to a ratio with whole numbers.

Jasmine Yi 1G

I think that it doesn't matter too much what you write in the intermediate steps of your work as long as you use the correct unrounded values when actually calculating. Personally, I just write to the hundredths or thousandths place for values in intermediate steps, but I make sure to save the full ...

Jasmine Yi 1G

Like the other replies say, the difference between your answer and the answer in the solutions is close enough that it doesn't matter, but I had the same problem and it turned out that I was using 1.01 for the molar mass of hydrogen, because that was what I had memorized in high school. However, the...

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