CHEMISTRY COMMUNITY

Jasmin Kumar 1G

definitely watch the organic chemistry tutor videos or khan academy videos! they helped me a lot

Jasmin Kumar 1G

I liked electron configurations the most!

Jasmin Kumar 1G

I am currently a pre-med, but I have been looking into different graduate programs as well! if you are not sure always keep an open mind! we do have a lot of time to decide what we want to do in our future!

Jasmin Kumar 1G

I actually did better on the final than the second midterm last quarter, but I redid every single textbook problem and attended as many review sessions as I could! Just review as much as you can!

Jasmin Kumar 1G

last quarter it was proportional to how much time spent on it, so I would look through the syllabus and compare the lengths to get an idea of what is going to be the most on the exam!

Jasmin Kumar 1G

I feel the same as you! I do the textbook problems when we learn the content, and then redo them right before the exam so that they are fresh in my head! I also don't attend the UA sessions or step up sessions because I just don't have time for it! thanks for the tips!

Jasmin Kumar 1G

kind of disappointed with my score, but it is better than my midterm 2 score from last quarter so that is a plus! I need to study my [censored] off for the final though!

Jasmin Kumar 1G

anodes are where oxidation takes place and it loses mass, while cathodes are where reduction takes place and it gains mass. there was a problem on sapling for weeks 7/8 where we had to identify differences, so maybe take a look at that again!

Jasmin Kumar 1G

I was going to take chem 14c and chem 14bl together, but I could not get a spot in 14c, so I am just taking chem14bl in the spring, and hopefully chem 14c in the fall!

Jasmin Kumar 1G

to find n you have to balance the redox reaction that is given to you, so that you can plug that number (which is the moles of electrons) into the equation!

Jasmin Kumar 1G

unfortunately Lavelle does not teach 14c, only 14a and 14b!

Jasmin Kumar 1G

I am going to do a fiat lux, English 91c, chem 14bl and stats 13!

Jasmin Kumar 1G

definitely do every single textbook problem and go through them until you are super confident that you know how to do them! also go to as many TA review sessions as possible and UA review sessions about specific topics

Jasmin Kumar 1G

I am definitely going to review the Organic Chemistry Tutor videos. I watched his videos for the second midterm and they helped a lot, so I know that they are going to be helpful in the future!

Jasmin Kumar 1G

I am also working a part time job to mostly just get out of the house, especially since I stay home most of the time. I find that it is nice since I only work the evenings, and the rest of my time at home I study for my classes! you just have to find that good balance!

Jasmin Kumar 1G

definitely take breaks by doing something physical, like exercise or even just eating somewhere out of the house! I definitely need to take a lot of time away from my electronics when I study a lot for midterms!

Jasmin Kumar 1G

Lavelle did say in his email that this midterm will have more partial credit question, but did not specify how much! he might send out another email before Friday explaining the midterm in more detail!

Jasmin Kumar 1G

I am rewatching adventure time and icarly! great British baking show is always a good go-to binge show!

Jasmin Kumar 1G

I am also nervous too! last quarter I did good on the first midterm and bad on the second one and just hope that the pattern does not continue this quarter! It does make me more nervous though because the content is much harder!

Jasmin Kumar 1G

definitely watch the organic chemistry tutor videos, they helped me understand the concepts a little bit more, especially when I went back and did the textbook problems.

Jasmin Kumar 1G

I was planning on taking it this spring quarter or even over the summer, so that I can finish the chem series as early as possible!

Jasmin Kumar 1G

it will start on topics that are after midterm 1, and up until the day we take the second midterm

Jasmin Kumar 1G

the dispossessed is really good if you like dystopia and science a lot!

Jasmin Kumar 1G

I think since it was updated in the middle of the week, it caused you to have that grade. I would just wait until the total points are collected, which will probably be at the end of the quarter, and then see if you are missing anything.

Jasmin Kumar 1G

to find the moles you have to use PV=nRT and solve for n, then plug that back in to the equation w=-nRTln(v2/v1) and make sure that you use 0.0821 L*atm/mol*K for R in the first part and 8.314 J/K*mol for R in the second part

Jasmin Kumar 1G

I don't necessarily count how many hours a week I study, but doing a little bit of reading and textbook problems everyday, as well as lectures and discussion should be sufficient enough. And then before big tests, go over problems that you had trouble with or go to UA or step up sessions

Jasmin Kumar 1G

make sure to count all of the valence electrons, and make sure that you put double bonds and triple bonds where they need to be in order to fulfill the 8 valence electron rule, because the single, double, and triple bond enthalpies have different values, so if you draw them wrong, you can end up get...

Jasmin Kumar 1G

The partial credit is only going to be for the 10 point questions, so it will probably be you can get half of the points if you chose the wrong answer!

Jasmin Kumar 1G

I felt pretty confident about it, but I don't want to jinx myself :) I think that doing the textbook problems helped out a lot

Jasmin Kumar 1G

definitely do the textbook problems and keep doing them until you understand each one, cause sometimes they are on the tests

Jasmin Kumar 1G

from the textbook, H2SO4 is the only acid where the second ionization is relevant, but for others listed the first one is the only one that is used for calculations. Hope this helps!

Jasmin Kumar 1G

last quarter it took about a week for the grades to come out, cause Lavelle does go through the tests after everyone has taken them to see if there are any mistakes! so hopefully by next Friday, we will know our grades!

Jasmin Kumar 1G

I think it will depend on Lavelle, since the first exam last quarter had partial credit while the second and final did not! Just make sure to study for the exam!

Jasmin Kumar 1G

I think that it might just be a typo, if you got the correct answer!

Jasmin Kumar 1G

most definitely review all of the textbook problems and make sure you understand them, cause in 14A a lot of test questions came from the textbook!

Jasmin Kumar 1G

you have to use the table and find Kc for the given temperature, then you just write your equilibrium constant equations, and plug in all of the numbers, and lastly just rearrange to solve for the concentration of H2

Jasmin Kumar 1G

you have your equilibrium constant, and concentrations, so you just plug in the numbers that you have to solve for Br2, which would be Kc=[Cl2][Br2]/[BrCl]^2, and rearrange to solve for the concentration of Br2

Jasmin Kumar 1G

I am taking LS23L which is the bio lab course right now, and we do the labs through a simulation, so I would assume that is how it is going to be done for 14BL as well. Not exactly sure though!

Jasmin Kumar 1G

the problem should tell you what the states of the reactants and products are so that your equilibrium constant equation is correct, and solids and liquids are always left out!

Jasmin Kumar 1G

I do not think that you are able to get notified when someone has replied to your posts so you may just have to check constantly, but if you go to your account maybe there is a way to get emails or notifications about your posts.

Jasmin Kumar 1G

I normally do molar concentrations because it easier to have the final answer at the end, rather than having to divide by the liters at the end because I would probably forget.

Jasmin Kumar 1G

the password for the website is LL14B21 so just make sure that it is uppercase in case it is case sensitive!

Jasmin Kumar 1G

super acids are when the ph is below 0 and super bases are when the ph is above 14. Since you take the negative log of 10^-n, it would come out with a ph of below 0 or above 14.

Jasmin Kumar 1G

The only things that are graded weekly are chem community and sapling, but you should also try to do the textbook problems and attend step up sessions and workshops because they are very beneficial.

Jasmin Kumar 1G

I definitely realized how important the textbook questions are. Do them even though they aren't assigned. I would suggest doing them as we progress, and then before the test, go over ones that you didn't understand and review the rest of them!

Jasmin Kumar 1G

You take the concentration of that product or reactant in the equilibrium constant equation, and raise it to the power of whatever the stoichiometric coefficient is.

Jasmin Kumar 1G

In the syllabus, it states that the midterms are going to be during class on Friday Week 4 and week 7!

Jasmin Kumar 1G

just to be safe I would make 50 more posts by the end of the quarter, in case they don't carry over

Jasmin Kumar 1G

the lectures are all recorded, and I think they will be uploaded at 11 for every class, and the discussions aren't mandatory I think since participation comes from chemistry community!

Jasmin Kumar 1G

for Q I got .5, so it may have been a rounding error when you calculated Q.

Jasmin Kumar 1G

since you came from a different class, I would assume that your total by the end of the quarter should be 50 posts. I would double check, but it wouldnt make sense for you to make 100 posts, when we only get 50 points from chem community

Jasmin Kumar 1G

they are on his website underneath the tab for the final exam review schedule!

Jasmin Kumar 1G

it probably has updated itself on CCLE or myucla yet. Just wait and check back later and it will probably fix itself!

Jasmin Kumar 1G

I think that having them memorized will make the final go more smoothly since you won't have to worry about if it a strong acid/base!

Jasmin Kumar 1G

there are 30 questions each worth 6 points!

Jasmin Kumar 1G

I don't think that there is a curve for this class since it is a point system that determines our grades

Jasmin Kumar 1G

definitely going to binge watch a bunch of shows lol

Jasmin Kumar 1G

I believe that Lavelle said to not have the class overlap with any of your other classes just in case. Since he is teaching it, I assume that the structure will be the same for 14B!

Jasmin Kumar 1G

The final is going to be on Sunday 12/13! It is on the study list on your myucla!

Jasmin Kumar 1G

the total is out of 500, so add up your midterm 1 and 2 raw scores, chem community points, and homework points so that you can see how many you have as of right now. You can also see what you need on the final to earn the grade that you want!

Jasmin Kumar 1G

If its like other classes I am taking, there is usually more emphasis on the material that we learn in the later weeks, but I am not sure so don't take my word for it!

Jasmin Kumar 1G

Finals are week 11, which is only finals for your classes, so we will have lectures and discussion during week 10. But after that, we are done!

Jasmin Kumar 1G

On myucla, it says that the lectures will be online-recorded, so it might be the same way that it is right now. I am not completely sure though!

Jasmin Kumar 1G

Sigma bonds are from end-to-end overlap, and pi bonds are from side-by-side overlap!

Jasmin Kumar 1G

My TA said that the exam is going to be on Sunday at the times listed on myucla!

Jasmin Kumar 1G

I did well on the first midterm, not sure about the second, but do as many textbook problems as you can. Lavelle said in his email after the first midterm that "the harder questions were mostly from the homework and students can use the textbook and student solutions manual to review them."...

Jasmin Kumar 1G

the pi bonds form when the p-orbitals overlap side by side

Jasmin Kumar 1G

I had mine yesterday, and I do think that the difficulty was greater on this test than the last test! Just do lots of practice problems and read the textbook! Good luck!

Jasmin Kumar 1G

I think that the minimum is 12 units, so you should be all good!

Jasmin Kumar 1G

I usually go to the gym and do weights, and then walk a mile afterwards! Helps relieve a lot of stress!

Jasmin Kumar 1G

It's only the last 8 bullet points of outline 2 and outline 3, so I would think that we don't have to remember that content until we get to the final!

Jasmin Kumar 1G

I look through all of the problems first, just to see what I'm working with, and then do the easiest problems first, and then move on to harder problems. You have to also remember that is just one test and one grade. If you do bad on test, brush it off and keep your head up!

Jasmin Kumar 1G

My TA explained it in that butanol has an alcohol group that can have hydrogen bonding while diethyl ether does not, so butanol would have a higher melting point.

Jasmin Kumar 1G

My TA said that there are going to be questions that have less calculations, so there will more likely be more questions that are shorter than the first midterm!

Jasmin Kumar 1G

I think it is only recommended to take both of the classes together, but you do not have to. I was going to but with my planned schedule, I will have to take them in separate quarters.

Jasmin Kumar 1G

I believe that it is only discussions on Wednesday that are cancelled.

Jasmin Kumar 1G

Yes! Only discussions on Wednesday are being canceled.

Jasmin Kumar 1G

Thank you so much for the video!

Jasmin Kumar 1G

I also posted a question about grades, and someone commented Thursday!

Jasmin Kumar 1G

I think that it would depend on the other classes that you are taking. If you are taking high demand classes than you should enroll in those for first pass, and then 14B for second, but if not, then I would just enroll in 14B for your first pass :)

Jasmin Kumar 1G

When will we be able to review and see our grade for the Midterm 1? Thanks :)

Jasmin Kumar 1G

That sounds fun! I went out to dinner with my parents!

Jasmin Kumar 1G

Yes! I believe that that is how you would do it, since you have to follow Hund's Rule!

Jasmin Kumar 1G

I just went to the regular discussion link like 5 minutes before, and my ta said to go the other link, so if you want you can go to the regular discussion link or just go to the zoom link on the midterm!

Jasmin Kumar 1G

yes, your phone should show your workspace and then you just have to be on respondus while you take the exam!

Jasmin Kumar 1G

so I used v=c/lambda to find the frequency, and then I used the equation v=R[1/n1^2-1/n2^2], where I plugged in the values of v, R, and n1 and then I solved for n2. I did have to round a little bit when I got to the step of taking the square root, but if you use this equation you should get the answ...

Jasmin Kumar 1G

That is actually the correct answer, the solutions manual had an error in the calculations, so you got it right!

Jasmin Kumar 1G

For studying, I am going to be doing as much textbook problems that I can, because it will help me understand how to go about doing a problem, and what to look for in problems. Im probably just going to review notes, and since we get equation sheet and a periodic table, Im not going to worry about m...

Jasmin Kumar 1G

My TA said that it will be fairly short since we do only have 50 minutes to do the questions. She also said that its multiple choice as well!

Jasmin Kumar 1G

Thank you so much! It is really is helpful!

Jasmin Kumar 1G

The answer for this is D. When they first did the experiment, no electrons were being ejected from the metal surface, so they increased the intensity of the light, and still there were no electrons being ejected. This is what made them change the frequency of the light to UV light, so that finally e...

Jasmin Kumar 1G

First you determine that the final energy level is n=1, because it is UV light. Then you convert the wavelength into into meters. From there, you find the frequency, v, from the equation v=c/lambda. You then plug in n1^2, Rydberg's constant, and the frequency into the equation v=R[1/n1^2-1/n2^2]. An...

Jasmin Kumar 1G

The correct answer is 486 nm. If you plug in the values of n into the equation v=R[1/n1^2-1/n2^2], you would get 3.29*10^15[1/4-1/16]. And since you need the wavelength and not frequency, v changes to c/wavelength. The final equation would be (3.00*10^8)/3.29*10^15[1/4-1/16], and then you multiply y...

Jasmin Kumar 1G

Under quick links in the top left, there is a link for "your posts" and it shows where and how many you have posted

Jasmin Kumar 1G

There is a page on his website that has all of the rules of sig figs. For problems, you would match sig figs of the number that has the lowest sig figs, which should determine how many numbers to the right of the decimal point you should put in your answer.

Jasmin Kumar 1G

I believe that if the given mass in the problem is the same as the mass you calculated from the empirical formula that you derived, then the molecular and empirical formula would be the same. Does that help?

Jasmin Kumar 1G

I can help with the first, but I was also unsure with the last two! You have to use the equation E(k)=1/2mv^2, where velocity is given, and the mass of the electron is 9.1*10^-31 kg. The mass of an electron is constant so that is why it isn't given in the problem.

Jasmin Kumar 1G

I think he is referring to how it is discrete, rather than continuous, so quantized is synonymous with discrete! So, yes, I believe it is referring to individual or very small amounts.

Jasmin Kumar 1G

I believe that you have until Sunday to do 5 posts, and then it starts over on Monday, and you have until Sunday. You can post 5 times on Monday and get all your points because you only need to post 5 times for the week.

Jasmin Kumar 1G

Solute is whatever is being dissolved, and the solvent is what it is being dissolved in!

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