CHEMISTRY COMMUNITY

Katie Phan 1K

2nd protonation is usually much smaller than 1st anyway.

Katie Phan 1K

Yes and I think we have that formula/constant sheet too!

Katie Phan 1K

I like reading the textbook and looking at the problems.

Katie Phan 1K

Katie Phan 1K

Just the coefficients!

Katie Phan 1K

Check this class's groupme! I know a lot of people post links to shared folders full of UA worksheets.

Katie Phan 1K

It'd probably be best to memorize the strong acids/bases as there aren't that many.

Katie Phan 1K

Either is fine, I think. I prefer graphing for obvious reasons.

Katie Phan 1K

Kelvin

Katie Phan 1K

... is this why they said to drink bleach?

Katie Phan 1K

M is molarity. Moles will be referred to as mol or moles.

Katie Phan 1K

I wonder what the logistics of having midterms/tests during scheduled lecture times will be like.

Katie Phan 1K

If you really loathe the major you're in right now, switch to something that you enjoy! I don't think the process is too difficult unless you're switching into a whole other school/college.

Katie Phan 1K

Sapling is required! In the past, I believe it wasn't, but now it is. You buy the bundle that Lavelle has up on the site, it's around $70ish dollars I believe for multiterm access. It gives you access to the ebook and other resources. Sapling is also where you do the homework which I believe is wort...

Katie Phan 1K

Just an FYI, I believe a bot checks if you've made 5 chemistry community posts every week.

Katie Phan 1K

Don't psych yourself out! Study as best as you can and whatever happens, happens! If you've done all that you can do then just have confidence in the fact that you actively prepared yourself for the test.

Katie Phan 1K

I'm sure some questions will be formatted like the textbook questions but not all of them.

Katie Phan 1K

I don't think we need to know this.

Katie Phan 1K

It'll be cumulative based on how much time we spent on each topic in lectures.

Katie Phan 1K

The "SO I BRought NO CLean CLOthes" thing is genius. I typically just memorized them all.

Katie Phan 1K

Hey everyone, I was wondering if anyone on here could tutor me on molarity, i cant seem to undestand it all the way through. If you can tutor me please reply and ill frind a way to conatact you. Watch the videos that Lavelle has up on his website! And do the audio-visual units about molarity/diluti...

Katie Phan 1K

I think Lavelle said something about finishing up the syllabus? So maybe he'll put grade breakdowns on that.

Katie Phan 1K

What everyone else said about the staircase! Divide up the periodic table into blocks and you'll get it in no time.

Katie Phan 1K

I honestly think we'll still be having lectures week 10.

Katie Phan 1K

choose your fighter https://scontent-sea1-1.xx.fbcdn.net/v/t1.0-9/88064312_2557157307726045_2653155032798593024_n.jpg?_nc_cat=106&ccb=2&_nc_sid=8bfeb9&_nc_ohc=4QXy_lLPnE0AX97wGTR&_nc_ht=scontent-sea1-1.xx&oh=2e9589e2bd801080c24a95d67a9a8445&oe=5FF0E396

Katie Phan 1K

What others have said about triangular/cyclic shape is correct.

Katie Phan 1K

Honestly, any graphing calculator will do. Scientific is fine and all but graphic calculators are better when dealing with so many calculations in chemistry and large numbers.

Katie Phan 1K

I haven't been to sessions/workshops. I find that just taking info straight from the book is really helpful, as well as supplementing with info from lectures.

Katie Phan 1K

Keeping track of states will be useful when you're doing total/net ionic equations and trying to see if a precipitate is formed.

Katie Phan 1K

Victor's summary is good!

Katie Phan 1K

It covers everything! I'm pretty sure it'll be the same format as the midterms.

Katie Phan 1K

Try not to think about it so much. Enjoy your Thanksgiving and be present!

Katie Phan 1K

Does anyone know what the letter grades are in regards to percentages/points? There's no scale that I know of.

Katie Phan 1K

It usually is implied that it's at equilibrium.

Katie Phan 1K

Bond length is basically associated with the energy required to break the bonds. Bonds that are shorter are stronger since the atoms/molecules are more tightly held, making it harder to break them apart.

Katie Phan 1K

They all have dispersion forces because at some moment in time, nonpolar molecules can have temporary dipoles.

Katie Phan 1K

Everyone else put it perfectly! Hope you understand now.

Katie Phan 1K

Does anyone know what sections of the textbook midterm 2 covers?

Katie Phan 1K

To my knowledge, there isn't a trick or life hack that will make it faster to do resonance structures.

Katie Phan 1K

I don't think it's too difficult to memorize the exceptions! Also sometimes when you look at a structure it just makes more sense when you think about its stability and formal change.

Katie Phan 1K

I'm not sure what the specific grade breakdowns are. Maybe email him?

Katie Phan 1K

What are you confused about?

Katie Phan 1K

I think he's expecting us to know whatever he has talked about in lecture such as lewis acids/bases but nothing else until we go into further depth.

Katie Phan 1K

I don't think we are expected to memorize SI units. The picometer conversion was actually on the formula sheet for the midterm! It was a little hard to find for me too.

Katie Phan 1K

Gamma rays have the smallest wavelengths and therefore have the highest energy as they have high frequency!

Katie Phan 1K

If you ever forget trends, just think about what you know about atoms. It's better to know the reasons why these trends occur rather than just remembering them. However, I do find it helpful to write arrows on my periodic table just to refer back to.

Katie Phan 1K

Valerie explained it perfectly!
Just find the energy of the light, convert it to eV, subtract the experimentally measured energy of ejected electrons, then convert the electron affinity to kJ/mole.

Katie Phan 1K

Hi. I'm having some trouble with the homework question pertaining to the wave patterns associated with the Bohr orbits of the hydrogen atom. Could someone explain to me what a sinusoidal and constant wavelength around the orbit looks like?

Katie Phan 1K

A good practice is probably rounding at the end!

Katie Phan 1K

It's included in the readings but I think Lavelle said it's not something we need to know.

Katie Phan 1K

Yes, I don't think you need to know how to determine it, just need to know the quantum numbers.

Katie Phan 1K

If you're still confused just look in the textbook! It'll tell you what exactly it's used for.

Katie Phan 1K

Is Schrodinger's equation on the midterm and if so, to what extent, if at all?

Katie Phan 1K

From n=6, an electron could drop to n= 5,4,3,2,1 so you have 5 spectral lines. The highest energy transition would be from n=6 to n=1, which would be the lower wavelength when thinking about the range. The lowest energy transition would be from n=6 to n=5, which would be the larger wavelength when t...

Katie Phan 1K

3d, 4s

Katie Phan 1K

It wouldn't be wavelike properties since it is not continuous like a wave, rather it is quantized.

Katie Phan 1K

to find the mass, divide the molar mass of O2 by Avogadro's number and then convert it to kg!

Katie Phan 1K

If so, you could probably get a webcam on Amazon for like $10.

Katie Phan 1K

Just kidding, i figured it out.

Katie Phan 1K

I'm kinda having trouble superscripting on Sapling? I'm trying to do it for an electron configuration but can't seem to do it.

Katie Phan 1K

These aren't just strictly STEM clubs but if you're looking for other clubs and activities there's a mega thread on reddit!
https://www.reddit.com/r/ucla/comments/ ... o_get_the/

Katie Phan 1K

I think there's a lot of confusion with whether dissolving salt in water is a chemical or physical change since when you boil off water you end up with salt, but I'm going to have to agree with Sami and Trisha since ionic bonds are intramolecular.

Katie Phan 1K

I forgot to mention in my previous post but I just realized that other exceptions would be things like oxides and acids. Acids usually begin with H and oxides end in O. Another example would be hydroxides since they end in OH.

Katie Phan 1K

Some exceptions to what the other's have stated would be in the case of ionic compounds in which the cation is listed first and then the anion, regardless of alphabetical order.

Katie Phan 1K

Please, someone, correct me if I am wrong but I believe all ionic compounds are solids. I think they're important when you're trying to contextualize a homework problem and such but I don't think it's necessary to always write them.

Search found 65 matches