CHEMISTRY COMMUNITY

Vanessa Perez

just remember how far along we are. This is the final stretch. It can be very stressful but just know that you are doing your best!!!

Vanessa Perez

do not forget about day light savings!

Vanessa Perez

Hi! For this question, I looked at the appendix to find the half rxns and the half rxns I got were NO3- + 4H+ + 3e- -> NO + 6H2O (E naught = 0.96) and Hg2 2+ + 2e- --> 2Hg (l) (E naught = 0.79). From these half rxns, I saw that to get the desired reaction for part a, we would have to reverse the se...

Vanessa Perez

like every one else said, intermediates are introduced in one step and then consumed in another. I am not sure if this will be a main topic on the final though

Vanessa Perez

I miss hugging my friends and family pre-covid

Vanessa Perez

I will be reviewing the book problems that I have the most trouble with and watching YouTube videos on concepts I do not understand. Also I am attending as many review sessions as possible

Vanessa Perez

A key thing to just remember is that anode is losing electrons and going to cathode which gains electrons. I have seen once the cathode being on the left and the anode on the right, but still the electrons are going from anode to cathode, so as long as you know which is which you'll be fine!

Vanessa Perez

they are the same for this class

Vanessa Perez

I do not think it can happen simultaneously. are you talking about oxidizing and reducing agents?

Vanessa Perez

Zero order - rate doesn't depend on concentration First order - depends on one concentration Second order - depends on two concentrations or the square of one In elaboration of this, basically the order of the reaction marks the relationship of the concentration of the reactants with the rate of re...

Vanessa Perez

i actually kinda enjoy electrochem and balancing acidic and basic equations

Vanessa Perez

When I learned how to balance Redox reactions, I learned to start by balancing both reactions in the same way: (1) balance non H or O elements (2) add H2O to balance O (3) add H+ to the opposite side to balance H (4) Balancing overall charge For an acidic reaction, you can leave it in this state, a...

Vanessa Perez

My favorite snack to snack on is peanut butter jelly sandwich with banana inside. Then I pair this with an iced coffee. Even if it is cold outside iced coffee>> hot coffee

Vanessa Perez

Although I sometimes hate when people say there’s nothing much you can do now, it’s true! And if you are feeling nervous just now u tried your best and there’s still another opportunity to redeem yourself

Vanessa Perez

Make sure u understand textbook problems as well as go to step up review sessions! I would say try going to at least one a day!

Vanessa Perez

As others have stated deltaGo is the deltaGunder standard conditions. However, I think what's most important to remember about the relationship between deltaGo and deltaG is that they can be used to find each other given Q as deltaG = deltaGo + RTln(Q). So if deltaG = 0, does that mean that deltaGo...

Vanessa Perez

I’m pretty sure you can review your exams with any TA during office hours!

Vanessa Perez

I have been trying to actually fully understand the textbook problems and connect all the equations. There are a lot of equations so I am also trying to remember and and understand when to use each one

Vanessa Perez

Yes! I was getting a little confused on this too! But K is equilibrium constant. Also look at for Q too!

Vanessa Perez

Some interesting GEs I’ve taken are Chicanx Studies 10A and B, EDM 8 which is a musicology class about the history of EDM. I am not a big fan of EDM but this class was very interesting.

Vanessa Perez

Yes! Always make sure to convert temp to Kelvin, unless you are doing deltaT. The reason we do not need to convert for deltaT is because a change in Celsius is the same as a change in Kelvin. However, this is only the case for temp... I think. I’m pretty sure it doesn’t work for deltaV

Vanessa Perez

We use Cp when pressure is constant and Cv when volume is constant. Remember the difference between diatomic and monatomic

Vanessa Perez

not sure. but Lavelle will update us later. I think it material for Midterm 2 will end after 3rd law of thermodynamics, but idk

Vanessa Perez

It depends what you are given. n is for moles while as m is for grams.

Vanessa Perez

I think I will take it next quarter with 14C. I dont know if it gets filled quick.

Vanessa Perez

how I will be preparing is reading the textbook and understanding the textbook problems. I am still very nervous for MT2 especially because the questions are worth so much. I also dont know if there will be partial credit for this midterm, like in 14A.

Vanessa Perez

I agree with Alex, last quarter I found the final a little more difficult just because it was cumulative and had to review everything from earlier weeks. And like Alex said, there are alot of review sessions that UAs hold and they are very helpful. I would say trying going to at least one a day

Vanessa Perez

I am planning on taking 14C and BL together.

Vanessa Perez

I think it's the same as 14a, no curve. He only gave a 10 point gift because many people found the final very difficult. But I am not sure if he'll do that

Vanessa Perez

jessicaosuna_1F wrote:This diagram is helpful for thinking about Le Chatelier's Principle!

ooooo very helpful diagram! thank you!!

Vanessa Perez

I felt the same too! I felt like I was completing acid and bases questions easily before the midterm but after the midterm I felt really down. And what makes it worse is I don't think there is a curve like 14a.

Vanessa Perez

For me I like to work on the textbook questions and go to UA sessions. I also like to go back to the lecture if I did not understand a concept as much or even watch youtube videos

Vanessa Perez

I am pretty sure, unless specifically told otherwise, we are to maintain that the only strong acids are whatever was on the Chempendix that specifically labels the strong acids (HCl, HBr, HI, H2SO4, HNO3, HClO4, and HClO3, where even HCLO3 can sometimes be considered a weak acid). Also, the table i...

Vanessa Perez

I think certain choices for questions will be partial credit, so depending which one you choose you will get partial credit if the choice is on the right track, full credit if it is correct, or no credit if it is for sure not correct.

Vanessa Perez

sza's new music has been on replay for me, even her unreleased on soundcloud, I'm worried I'm going to get tired of her lol.

Vanessa Perez

partial pressures can be solved using ICE tables! they are also applicable to concentration

Vanessa Perez

i was also confused on the units but it is kJ/mol

Vanessa Perez

I have also been having trouble staying motivated. But I do think what has helped me is I stop studying at a certain time and having a restful sleep. I look forward to this everyday so that is my motivation. I think what can help is rewarding yourself so that you have something to look forward to ev...

Vanessa Perez

Ka is related to acids so a reaction HA + H_{2}O \Leftrightarrow H_{3}O^{+} + A^{-} will be written in terms of Ka being [H3O+][A-]/[HA]. Similarly for the Conjugate base A-, the reaction A^{-} + H_{2}O \Leftrightarrow OH^{-} + HA will be written in terms of Kb being [OH-][HA]/[A-]. Same is true fo...

Vanessa Perez

I think it will be like last quarter where TAs will give out zoom codes. I think the only thing different is it will not be during section, instead it will be during class time

Vanessa Perez

yes to add on, you basically want to isolate PCL3 so first multiply both sides by 1.18, then divide by 5.43. after this PCL3 will be isolated.

Vanessa Perez

RyanKopeikin_2I wrote:pKa is the NEGATIVE log of Ka : -log(Ka) = pKa . To convert from pKa to Ka, you would do: Ka = 10^-pKa. Just a little trick in general, the presence of that "p" (as in pH, pOH, pKa, etc) means taking the -log.

thank you so much! very helpful

Vanessa Perez

Pressure is a measurement to describe gases, therefore only consider moles of gases

Vanessa Perez

I was also confused on this, but it is a weak acid

Vanessa Perez

if you get two positive x values from the quadratic formula, plug it into your ICE table, if the value outputted then is negative, do not use that x value

Vanessa Perez

my advice is attend as many UA sessions as you can and practice the book problems. I think the best thing is making sure you know how to approach and solve book questions

Vanessa Perez

I think it will be unit 1,2,and 3. He will announce it as midterm approaches

Vanessa Perez

0.5 is in liters. this came from converting 500 ml to L in order to get molarity which is moles/Liter

Vanessa Perez

wow!! thank you so much, very useful

Vanessa Perez

I went to as many UA sessions and did all the textbook problems when studying for the final

Vanessa Perez

What I have been doing to relax and make sure I am on track is writing everything I have to do so that I do not feel behind. For relaxing, I like to take little naps when I can

Vanessa Perez

I'm pretty sure we will be using Kelvin. So it will be important to know how to convert to Kelvin if not given Kelvin

Vanessa Perez

las quarter I only went to 1 a week and I regret it. I think 2-3 would be a good amount per week. They are very helpful, if you understand the material well, then you probably do not need to attend as many.

Vanessa Perez

UA sessions are very helpful so I recommend going to those weekly, and as many as possible a week since the worksheets are not the same. I would also recommend watching video on the topics and reviewing old notes. Professor Lavelle also did mention that only ~20% is 14A material.

Vanessa Perez

LeahSWM wrote:I will simply just be forgetting. lol. will not catch me doing any studying until January 5th.

... same, my brain needs it

Vanessa Perez

I plan to attend more UA session, I really thought that all UA sessions would be the same and have the same worksheet which is why I only attended one a week. So next quarter I hope to attend as much as I can each week. I also plan on using my weekends more efficiently.

Vanessa Perez

I will definitively be sleeping in during break. I really want to do crafts or activities to make Christmas feel more Christmas-y this year. I hope you all have a relaxing break, we all deserve it!

Vanessa Perez

cleaning up my space makes me feel less anxious. I normally end up cleaning the whole house without even noticing haha

Vanessa Perez

yes I am pretty sure in his email that he will have grades by saturday for his 6 classes.

Vanessa Perez

So Friday's is recorded or is it live?

Vanessa Perez

thank you for clarifying. I do not think my TA has brought up there being 2 proctors instead of 1.

Vanessa Perez

Thank you!!! this was very helpful, I was confused on this topic.

Vanessa Perez

By comparing the electronegativity, you can determine which bond is more ionic. As Lea said. Also distance has an effect on ionic character

Vanessa Perez

Yes H+ and proton are interchangeable!

Vanessa Perez

here's a link to strong acids and bases if you need for reference https://sites.google.com/site/chempendi ... cids-bases I think it would be helpful to memorize these

Vanessa Perez

yess! I have been having similar issues. This barely started for me this week though so I don't know what is going on

Vanessa Perez

yea I think we need to know all shapes

Vanessa Perez

Thank you!! I was looking for videos to watch about naming.

Vanessa Perez

Hey! I agree with what was said so far about them being in alphabetical order. I found this really good site that has all the rules, so you should definitely check it out when you get the chance. Here's the link: http://www.chemistry.wustl.edu/~edudev/LabTutorials/naming_coord_comp.html Thank you!!...

Vanessa Perez

The Lewis structure with no charge or Lewis structure with the least amount of atoms with a charge is the most stable.

Vanessa Perez

I'm pretty sure it will be the same discussion link, or TAs will send a new one.

Vanessa Perez

Yea I do not think that Dr. Lavelle mentioned anything about partial or extra credit.

Vanessa Perez

I would refer to the specific document of ligand names from Lavelle's class website. Since he made it himself, I don't think he would test ligands that do not appear on the list. It also has some examples for further clarification and practice. However, you are not able to use it on exams. https://...

Vanessa Perez

I'm in the same boat as you Janna, I am starting to feel very discouraged and stressed for the final.

Vanessa Perez

Here is a helpful summary of the molecular structures that we have done so far and their corresponding bond angles. Please feel free to add to this list! -linear 180 degrees -trigonal planar 120 degrees, -trigonal pyramidal 109.5 degrees -trigonal bipyramidal 90 degrees, 120 degrees -octahedral 90 ...

Vanessa Perez

What kind of fish is made out of 2 sodium atoms?

2 Na

get it? (tuna)

Vanessa Perez

Xe is permitted to expand its octet because of its energy level. It is able to hold 12 electrons. Another example of expanded electron is P which can hold up to 10 electrons.

Vanessa Perez

I tend to do all the practice problems assigned and then try to explain answers from sapling. I like to read the book to understand topics conceptually

Vanessa Perez

yes that it correct! follow the energy levels

Vanessa Perez

yea I don't think we 100% know if its asynchronous or not yet. So hopefully soon

Vanessa Perez

thank you all for answering this question! I was having trouble understanding this topic too

Vanessa Perez

Something I like to do to decide to add a triple or double bond is always finding the FC because sometimes, lone pairs is better than double bonds in relation to FC.

Vanessa Perez

I was really into That's 70's show, but then Netflix took it down and I did not have the chance to finish it... rip. A show that I was really into before this was Prison Break. It is a pretty good show!!

Vanessa Perez

yes 4s will generally always come after 3d because 3d has lower energy than 4s.

Vanessa Perez

Cl will have lower ionization energy because it is more to the right on the periodic table than O

Vanessa Perez

Goodluck everyone who has not taken the midterm yet. I will be trying to catch up on my sleep after this!!

Vanessa Perez

I like to keep my hands busy. I know this isn't really exercise, but I like to draw while listening to music when I am taking a break. Or even just go outside and get the mail haha

Vanessa Perez

OwenSumter_3D wrote:
oxidation.JPG

I found this guide for oxidation numbers online that I thought was helpful also.

thank youuuuu!!!!

Vanessa Perez

Yes they are still being held! these are the rest for today; Rosa Munoz 4-6 PM (Step-Up) & Matthew Tran 6-8 PM (Workshop)

Vanessa Perez

Hey yall! When choosing which resonance structure is least likely to contribute to the overall structure, would it be the Lewis Structure with the most charges? Or does this way of thinking not necessarily work all the time?

Vanessa Perez

Thank you everyone who answered this question. I was having trouble understanding this topic too

Vanessa Perez

I have been studying by doing the problems from the syllabus. There is an answer key on sapling website, so when I am stuck I refer to that. The document is called Atkins 7e SSM. good luck studying everyone!!!!

Vanessa Perez

I don't think we really need to worry about f-block for this class or at least not yet since we haven't really practiced f-block

Vanessa Perez

someone needs to teach me how to play. I've never played.

Vanessa Perez

Even though I am pretty sure for this class we only need to be comfortable with s,p,d,f-orbitals, there are g,h,i,k,l orbitals and so on. However, I find it interesting that there is no j orbital.

Vanessa Perez

Pretty sure it will be like the first midterm. During your discussion, 55min.

Vanessa Perez

Electronegativity increases going right on the periodic table because the number of protons in the nucleus increases, the electronegativity or attraction will increase. The nucleus brings in the electrons closer together because of the increase in attraction. Electronegativity will then decrease go...

Vanessa Perez

by going through the link on ccle it automatically logs you into sapling so I would say go to sapling through ccle.

Vanessa Perez

I hope you all did well on your exams! Pretty sure scores will be released early next week.

Vanessa Perez

I am pretty sure you are doing it correctly, I would have done it the same way too.

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