CHEMISTRY COMMUNITY

Mimi Lec 2H

The Z and E designations come from the German words zusammen, which means together, and entgegen, which means opposite. You can find this in section 1.4 Geometric Isomers in the organic chem textbook (page 14 at the bottom)

Mimi Lec 2H

Solids have lower molar entropy than liquids, and liquids have lower molar entropy of gases. In the gas phase, a compound has the highest molar entropy. I think there will be a decrease in entropy for this equation, because of the conversion of a gas and a liquid which have high molar entropy, into ...

Mimi Lec 2H

This kind of confused me too, I hope I did it right! If not, can someone let us know?

Mimi Lec 2H

On my quiz 2, one of them was a half order reaction, so I wouldn't rule anything out to be honest!

Mimi Lec 2H

Hi Jasmine, A heterogeneous catalyst is a catalyst (a substance that increases the rate of a reaction without being consumed in the reaction) that is in a different phase from the reactants. So basically, if all the reactants of an equation are in the gas phase and a catalyst that is present is a so...

Mimi Lec 2H

This might be dumb question, but could someone quickly explain the difference between the reaction rate and the rate constant? Reaction rate is defined as the change in concentration of one of the reactants or products divided by the time interval over which the change takes place. The rate constan...

Mimi Lec 2H

I think that was only specific to Lavelle's class :( I'm bummed about it, I have a very late enrollment time so I will probably just have to defer it till fall quarter

Mimi Lec 2H

are you guys also interested in a midterm review? I would love to study with a big group!

Mimi Lec 2H

I'm almost positive it's a typo and there has to be a coefficient of 2 for NH3. Without it, the reaction we are trying to find the standard enthalpy for is unbalanced. N2H4(ℓ) + H2(g) → NH3(g) : the reactant side has 2 nitrogen, 6 hydrogen and the product side has 1 nitrogen, 3 hydrogen, so there sh...

Mimi Lec 2H

Hi guys!
if anyone is interested in having a review session before Quiz 1 next week please let me know! I live in Sunset Village but I'm down to meet anywhere or even rent a pod/room at YRL!

Mimi Lec 2H

^ Just change your username to fit your new 14B discussion and to post each week, a week is defined Sunday-Sunday!

Mimi Lec 2H

Because we know it is a weak acid/base, we know that Ka is very small, so we can approximate, and basically set that x equal to 0. I think the rule is if the given Ka is smaller than 10^-4, you can safely approximate.

Mimi Lec 2H

There isn't a difference between sp^3d and dsp^3. I think it's usually written dsp^3 because d orbitals are lower in energy. It's like when writing the electron configurations: 3d10 4s2 etc.

Mimi Lec 2H

I read that the first Electron Affinity for Oxygen is negative because forming the O- ion actually releases energy, however, when forming O2-, it requires energy because you are forcing an electron into an already negative ion, so it will not go in willingly and needs an input of energy. This is why...

Mimi Lec 2H

I was wondering this as well, I don't understand why the book has Bromine triflouride listed under AX3 is stead of AX3E2 :/ Shouldn't they both be t-shaped and polar?

Mimi Lec 2H

If you look up the molecular orbital diagram for NO-, you can see just about how much lower the more electronegative atom is drawn (in this case, oxygen)

Mimi Lec 2H

So can you determine it by the number of atoms with lone pairs?

Mimi Lec 2H

I think in lecture today when doing equilibrium equations, the slide said in parentheses to ignore sig figs during one of the problems

Mimi Lec 2H

My course reader says that they will accept both? And I think memorizing the latin stems would be helpful. I think Iron (Fe) will be the most common one.

Mimi Lec 2H

Toolbox 17.1 in the book (page 741) has all of the rules listed and it's really helpful! Ligands are written in alphabetical order, by actual name, not symbol, also ignoring the Greek prefix that indicates the number of each one present. Step 8 states, "The name of a coordination compound (as d...

Mimi Lec 2H

I'm having trouble with the homework problem 17.33 where you're given some ligands and are told to identify which ones are mono/bi/polydentates. I know that polydentate signifies that the ligand can attach to more than one binding site simultaneously, but identifying them is a little confusing for m...

Mimi Lec 2H

Adiba_Chowdhury_1E wrote:How do you exactly find out if the complex has an overall negative or positive charge?

Adiba, I'm not 100% sure if this is correct but with the problems in the book, it seems that you have to find the individual charge of each ligand and of the central metal and add them up?

Mimi Lec 2H

Thanks so much!

Mimi Lec 2H

hey guys! I've been studying for quiz 3 and found that coordination compounds are tripping me up a little. I was wondering if this weekend anyone would like to meet up and hopefully break them down for me a little simpler? Or if anyone has any good videos explaining them, that would be extremely hel...

Mimi Lec 2H

hey guys!
Tomorrow my friends from C1 are going to meet in the lounge to review for the midterm! Feel free to drop by! We'll be there after 8 pm! :)

Mimi Lec 2H

hey guys, heres the link for the groupme!
https://app.groupme.com/join_group/25921542/EgBvC0.

Mimi Lec 2H

hi friends! I previously made a post on here about a study group for all of sunset village (other buildings welcome of course!) and figured it would just be easier to have a groupme chat! (Just download the app) Here is the link to join: https://app.groupme.com/join_group/25921542/EgBvC0. I'm hoping...

Mimi Lec 2H

hey!
to everyone interested, just text me, and we can make a group chat!
I wanted to meet this weekend to kind of debrief everything from lecture this week!

Mimi Lec 2H

Hey guys! I live in Courtside in the C4 building and wanted to know if anyone in all of sunset was interested in a study group! We could all meet at the end of the week to review and go over problems and study for the quizzes! I'd love to have a facebook group or iMessage so just let me know! 760529...

CHEMISTRY COMMUNITY

Search found 29 matches

Re: Cis & Trans

Re: Entropy

Re: Name the compound

Re: 1.5 Order Rxn?

Re: Heterogeneous Catalysts [ENDORSED]

Re: Quiz 2 Winter 2017

Re: 14C

Re: Quiz 1 Review

Re: Quiz 1 Prep #5

Quiz 1 Review

Re: 14A to 14B Changes in Chem Community

Re: Weak Acids and Bases

Re: Hybridized Orbitals with d

Re: Electron Affinity

Re: Polar vs. Nonpolar

Re: Higher/lower energy in a MO diagram?

Re: Identifying Polydentates? [ENDORSED]

Re: Significant Figures [ENDORSED]

Re: Coordination Compound Naming

Re: Rules for Writing Formula [ENDORSED]

Identifying Polydentates? [ENDORSED]

Re: Help with Coordination Compounds?

Re: Help with Coordination Compounds?

Help with Coordination Compounds?

MIDTERM REVIEW IN SUNSET VILLAGE

Re: Sunset Village Study Group

Sunset Village Study Group Take 2

Re: Sunset Village Study Group

Sunset Village Study Group