CHEMISTRY COMMUNITY

tholz11

The best way is to memorize! The Strong Acids are: HCl hydrochloric acid HNO3 nitric acid H2SO4 sulfuric acid HBr hydrobromic acid HI hydroiodic acid HClO3 chloric acid HClO4 perchloric acid Strong Bases are: LiOH lithium hydroxide NaOH sodium hydroxide KOH potassium hydroxide Ca(OH)2 calcium hydrox...

tholz11

You have to account for it "twice," once by writing in 2x and then a second time by squaring the concentration in the K expression.

tholz11

Yes, naught usually implies that this reaction happens at standard conditions at 298 K (-:

tholz11

I think of it like K and Q - G knott will be under standard conditions while G will be at adjusted conditions.

tholz11

Forward and Reverse reactions should be, as was said earlier in the responses, relative to how the equation is presented to you. So if they give you
A -> B
The reverse would be
B -> A

tholz11

Higher molar entropy is linked to more complex and larger molecules. Think about what would give a high w value, more ways to organize a structure (-:

tholz11

Yes, exactly. A larger k value will cause the reaction to be faster as long as concentration is constant.

tholz11

I think the question may be referring to how increasing T increases Pressure, (PV=nRT) and when pressure is increased the reaction will shift to the side with less mols of gas.

tholz11

I'd memorize the following information: 1. Any pure element has an oxidation state of zero. 2. The sum of the oxidation states of all atoms forming a molecule or ion is the net charge of that species. 3. In their compounds, group-1 metals have an oxidation state of +1 In their compounds, group-2 met...

tholz11

The oxidizing agent is a molecule that is reduced (gains electrons) in the process of taking electrons away and oxidizing another molecule. The reducing agent will do the opposite, oxidized (loses electrons) in the process of giving them to another molecule and reducing it You can tell which molecul...

tholz11

Im pretty sure most TAs count chem community posts overall and not per week . So don't stress!

tholz11

Summer_Corona 3L wrote:
tholz11 wrote:does this mean that w and q are always equal and opposite in isothermal rxns? or are they just both 0?

Yes, they're equal and opposite q=-w or w=-q

Thank you! I was rewatching lectures super confused about this earlier.

tholz11

Hi! My TA shared this list with us in discussion: RULES FOR ASSIGNING OXIDATION STATES Chemists use the following ordered rules to assign an oxidation state to each element in a compound. 1. Any pure element has an oxidation state of zero. 2. The sum of the oxidation states of all atoms forming a m...

tholz11

LS7C, EEB100, 14C, Calteach, and a geology upper div (:

tholz11

I think any calculator should be allowed.

tholz11

Brian Acevedo 2E wrote:Ever since quarantine started last year I seem to have developed a serious craving for the most low-effort foods, like toast or cereal. I don't really know why either, since I really enjoying making food lol.

Cereal >>>>>

tholz11

I have been OBSESSED with matcha lattes lately. literally had 3 this week.

tholz11

The entire album "we just need some time together" by BETWEEN FRIENDS is killer. songs from it have been brought up a few times in this thread before haha.

tholz11

I love the organic chemistry tutor but sometimes his stuff is a little too basic..

tholz11

Beginning of Lecture 17 was pools by Glass Animals !!

tholz11

I've never taken a class so determined to get me to pass! Thank you Dr Lavelle!

tholz11

The number under "your posts" should be correct

tholz11

does this mean that w and q are always equal and opposite in isothermal rxns? or are they just both 0?

tholz11

I believe it should be
97+ A+
93 to < 97 A
90 to < 93 A-
87 to < 90 B+
83 to < 87 B
80 to < 83 B-
77 to < 80 C+
73 to < 77 C
70 to < 50 C-
50 and below is a Failing grade

tholz11

For me, the best way to take notes is to write down the powerpoint and insert different extra notes he says in class. After class though, I find it really helpful to watch his video module (which is a lecture with roughly the same powerpoint) as a refresher and take any notes I missed while writing...

tholz11

I handwrite all my notes messy, then transfer the important info in an organized fashion into flashcards.

tholz11

I really like using a planner to split up the work I have to do. It makes it easier to manage everything and keep myself from burning out because I can complete smaller tasks over time rather than having a huge amount of work to complete at once. Planner totally saved my life this quarter. Makes ev...

tholz11

Personally doing an absolutely poor job of it. It was much easier to do with in-person classes because there was a clear distinction between classes and your free time. I just try to do my relaxing during the day when I'm most unproductive anyway and then study at night when I feel more awake. This...

tholz11

Anybody keeping up with the bachelor?? If michelle doesnt win Im losing faith in humanity lol.

tholz11

Allan Nguyen 2G wrote:50 points but don't forget that extra posts from previous weeks don't count I think

This depends on your TA.

tholz11

50 if you didnt take 14A with lavelle, 100 if you did!

tholz11

I've been trying to stay motivated by switching up my study spots and facetiming/zooming with friends to study together but its so difficult to keep my energy up at the end of the quarter tbh )-:

tholz11

I've heard great things about Castillo!

tholz11

I just stopped being vegan after 4 years and I've been eating a crazy amount of sushi lol.

tholz11

Last quarter I got credit making literally 50 posts in week 9/10 haha. As evidenced by my current post count I'm hoping for a repeat of that.

tholz11

The orgs I spend the most time on are my social sorority, calfresh, bruin dine, and usac!

tholz11

Cava and Pinches are my favorites! The new meetfresh that just opened is also great

tholz11

hi chesca!
Bplate tacos simply hit different. Also random but I miss the geology building and epss department like crazy!

tholz11

I think its possible if you have been paying attention the whole quarter and staying on top of lectures, etc. Then you have the background info necessary. Good luck!

tholz11

Mari Williams 1K wrote:Butterfly pea flower tea changes color with pH! People add lemon juice and it makes it look really cool.

I just bought some! Im very excited to use it haha.

tholz11

Speaking of culinary chemistry, if anyone has any recipes that can be made with ~microwave~ radiation let me know. Dorm life is a struggle. Trader Joe's has a lot of really nice and delicious frozen food. I really like their potstickers and butter chicken, but they have a lot of variety. I also rec...

tholz11

Honestly, Sapling problems really helped me practice concepts last quarter in 14A. I recommend it!

tholz11

Working and going to school is a real struggle. I'd recommend making sure you're putting aside time to study and reaching out for help from UAs, TAs, and professors when you can't.

tholz11

This made me feel a lot better, thank you for sharing!

tholz11

I was super excited to hear a lot of Glass Animals, I'm a longtime fan haha.

tholz11

This is the general UCLA test bank
https://www.bruintestbank.com/chemistry/

tholz11

Like mentioned above, I've found the textbook really helpful in breaking down the concepts and when you use which principles. Best of luck!

tholz11

I think it helps to move your space to somewhere new! I found that sleeping in the same place where you work can be detrimental to your work ethic haha. from experience.

tholz11

UA sessions & doing the textbook problems are the best ways to study in my opinion!

tholz11

Go to your user ID and click "search user posts" and they should show up. Hope that helps!

tholz11

Speaking of culinary chemistry, if anyone has any recipes that can be made with ~microwave~ radiation let me know. Dorm life is a struggle.

tholz11

The groupme is the same as last quarter!

tholz11

Yes, we have been getting points weekly

tholz11

I went on a run today with my housemate!

tholz11

Yes, it will be due weekly this quarter.

tholz11

It gives you no credit for the question /-:

tholz11

You would need to calculate Q again to figure out whether or not the equation is at equilibrium

tholz11

By messing around with the website for a while I was able to access sapling with my previous code. Trying clicking "use credit" when it prompts you.

tholz11

I recommend the textbook for the practice problems, as well as UA sessions/worksheets

tholz11

Have a good outline/ quick reference notes to look back on (-:

tholz11

I recommend the textbook, UA worksheets, or 14A test bank. Here's a link to some of those resources https://docs.google.com/document/d/1Qjb ... 1NHcc/edit

tholz11

Thank you so much!!

tholz11

Hi Mel! Thanks so much for having a session!
Can you go over how to tell if an atom is mono or polydentate?

tholz11

Pretty sure lavelle made a mistake here

tholz11

Textbook problems and UA sessions are probably the best ways to prepare for the final. They seem to have the most similarity to the actual exams he gives us.

tholz11

almost_ethan wrote:
tholz11 wrote:I believe you need a 93% to receive an A in the class

Does anyone else know if this is true? :0

Sorry if this was a confusing way to phrase this haha. 90% is still an A- but to get an A you need 93

tholz11

If we missed a question on sapling is that factored into the grade? As in, do we lose points off our grade?

tholz11

saplinglearning.com/ibiscms/login/ should work

tholz11

Lillian wrote:
305311217 wrote:I would love to hear professor Lavelle's input on this. I've been thinking the same thing haha.

Ey it might not be the best idea to have your name as your student ID. It's kinda important, man.

My bad, didn't notice that I had it as that.
Does UID fraud actually happen?

tholz11

Do you guys know if we're allowed to "make up" participation points from posts. Like if we make 4 posts one week and 6 the next?

tholz11

I like to leave my room and make a target run or walk somewhere in westwood, it makes me feel like a person again haha. Also a good way to destress and focus your energy on something other than school for a bit.

tholz11

I think you have to make a time to discuss with your TA, I'm not sure if we are allowed to discuss on chemistry community .

tholz11

I assume it'll be similar to the midterms but longer, and 180 points.

tholz11

I assume it'll be similar to the midterms but longer, and 180 points.

tholz11

Yea what a mood. I was hoping for a high B/low A in the class and after the second midterm that is not feeling probable. I'm glad at least we can get a passing grade with 50%.

tholz11

Did we receive partial credit for Midterm 2?

tholz11

I believe you need a 93% to receive an A in the class

tholz11

12 units is the minimum for a full time student and 19 units is the maximum unless you have an exception so you can have more units (-:

tholz11

Usually I start studying for finals the week after thanksgiving. I'm planning on reviewing concepts with youtube videos and doing practice problems from the book! (-:

tholz11

We're all meant to use the same periodic table from Professor Lavelle's website

tholz11

Yes, Chlorine gas would be Cl2 and Oxygen gas would be O2

tholz11

In combustion reactions, Oxygen is always in excess unless stated otherwise!

tholz11

I recommend a TI-84 calculator and using the periodic table Lavelle provides for us on his website.

tholz11

Hydrogen and Carbon's electronegativities are too similar to create the polarity needed for Hydrogen bonds to form.

tholz11

As said above, we have to use the blank periodic table Lavelle provides for us on his website

tholz11

I would love to hear professor Lavelle's input on this. I've been thinking the same thing haha.

tholz11

Happy Late Thanksgiving! My family likes to go on a road trip up the PCH over break, but this year it wasn't really possible with corona.

tholz11

When I'm feeling overwhelmed I like to go on runs around Janns and the Sculpture garden!

tholz11

I like to move out of my room to study to seperate "work space" from resting space. It forces me to pay better attention!

tholz11

I was feeling really good at the beginning of the quarter but the 2nd midterm didn't go well for me and now im stressed about the final because I need to perform very well )-:

tholz11

i can only tell bad chemistry jokes because all the good ones argon )-:

tholz11

So do we not get credit for attending section?

tholz11

the n=2 level would need to have 5 orbitals for 2d to exist, which is impossible as the only l values possible are 0 and 1. Therefore the largest ml range is -1 to +1 and the largest possible number of subshells at n=2 is 3. Hope that helps!

tholz11

Pretty sure Schrodinger's Wave Function is just used as a way to better understand and conceptualize atomic orbitals.

tholz11

Nodes are proportional to the l value, therefore it has 2 nodes

tholz11

Black Body radiation is a theoretical concept, because no such object actually exists with these properties. However, in theory a black body is able to absorb any frequency of light and emit radiation at any wavelength. Any emission is called black body radiation.

tholz11

Yup you got it!
As was said above, For addition and subtraction, round to the least amount of decimal places, and when you're multiplying or dividing use the same number of sig figs as the number with the least.

tholz11

Yes. Trailing 0s don't count unless there is a decimal present.

tholz11

Lots of repetition and practice problems will help you over time. If you're still struggling approaching the final making a quizlet would be a great idea!

tholz11

I agree with all the above posts,
n describes the electron shell
l describes the subshell (when l is 0, S, when l is 1, P)
ml is the different orbitals of the subshell

Therefore l would determine 3s vs 3p . Hope that helps!

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