CHEMISTRY COMMUNITY

Caitlin Dillon 3G

Also, remember that Z groups are on zee zame zide!!!

Caitlin Dillon 3G

Are the prefixes 'sec' and 'tert' only for the butyl substituent? I don't know when to use them

Caitlin Dillon 3G

In class, we never discussed "electrophilic aromatic substitution," but it is in section 4.2 of the organic chem textbook. Are we expected to know this for quiz 3 and for the final?

Caitlin Dillon 3G

What is the difference between the trend in how basic something is and how nucleophilic it is?

Caitlin Dillon 3G

Why can you take the coefficient before a molecule and include it in the exponent in the rate law for elementary rxns, but you can't do this for first order or second order rxns?

Caitlin Dillon 3G

I know that for cell diagram short notation, you write the anode on the left and the cathode on the right. But, does it matter in which what order you write the ions/elements.

Caitlin Dillon 3G

I just started the homework problems for Ch 14. I am really confused. Do we have to know how to balance redox reactions that take place in acidic and basic solutions? If so, do you have any tips?

Caitlin Dillon 3G

can someone please explain why it is more stable if delta G is negative/spontaneous?

Caitlin Dillon 3G

Hi. If you live in Hedrick Summit, would you like to meet up and study for our first chem quiz Tuesday night?

Caitlin Dillon 3G

Can someone please explain the difference between these two? I am having a hard time visualizing it. Irreversible has a constant pressure, and reversible does not? Correct? I also never know what formula to use for work.

Caitlin Dillon 3G

In lecture on Friday, I was confused about the difference between extensive property and intensive property. Can someone please elaborate?

Caitlin Dillon 3G

Correct. In order for a solid to go to a liquid, it must absorb heat, so it is endothermic and positive delta H. When a liquid goes to a solid, it must release heat, so it is exothermic and negative delta H.

Caitlin Dillon 3G

Remember Le Chatelier's Principle which states that chemical reactions adjust so as to minimize the effect of any changes. If you remove ammonia, the chemical reaction will adjust to minimize the effect of that change. Thus, to return back to equilibrium, more ammonia will be produced until the orig...

Caitlin Dillon 3G

Can someone please explain why strong acids and strong bases do not have Ka and Kb values? Is it because they dissociate 100% into products?

Caitlin Dillon 3G

I was struggling trying to memorize the 7 strong acids we need to memorize! I looked up easy ways to remember them and I found this, it is so helpful! Someone posted: "My chemistry teacher taught us a way to memorize the strong acids. I hope this is helpful: "[I] [Br]ought [Chlorine] into ...

Caitlin Dillon 3G

So since en is bidentate? Is dien tridentate because it has 3 nitrogens?

Caitlin Dillon 3G

Then, after determining whether you're looking at a pi bond or a sigma bond, you assign the hybridization orbital in order to go along with it. For example, if you were looking at the CH(subscript 2)(double bond)CHCHO, The first C would have three regions of electron densities, thus the hybridizatio...

Caitlin Dillon 3G

The key is to not over think it! In a single bond, there is one sigma bond. In a double bond, there is one sigma and one pi bond. In a triple bond, there is one sigma and two pi bonds.

Caitlin Dillon 3G

There is a typo in the textbook answer! 22 should be 2 and 11 should be just 1 so don't worry you are doing it correctly. CO: (sigma2s)^2(sigma*2s)^2(pi2p)^4(sigma2p)^2 CO+: (sigma2s)^2(sigma*2s)^2(pi2p)^4(sigma2p)^1 Remember it is in this order because for hetronuclear with z mixed, you use the MO ...

Caitlin Dillon 3G

the course reader explains this on page 110. Because the nuclear charge is less for atoms z<8, the energy difference between filled s-orbitals and p-orbitals is less. The electron density from filled sigma(2s) and sigma*(2s) orbitals is concentrated along the bond axis. Since the sigma(2Pz) orbitals...

Caitlin Dillon 3G

This is a little difficult to explain through typing. The definition of a dipole moment can be simplified by the equation: the Greek letter mu= Q(magnitude of the charge) x d (distance between those charges). We most likely won't have to show any math for this. However, we must know how to ANALYZE a...

Caitlin Dillon 3G

Hi everyone! I understand resonance structures (resonance is a blending of structures with same arrangements of atoms but different arrangements of electrons). However, I am a little confused as to how being able to draw multiple resonance structures for a certain molecule proves that that molecule ...

Caitlin Dillon 3G

The signs are always conventional. It's right with or without the sign but it depends on how the question was being asked.

Caitlin Dillon 3G

I know this may be a stupid question, but I am really behind in chemistry...Is the speed of light always 3.00 x 10^8 meters per second? Or just in a vacuum?

Caitlin Dillon 3G

I also use a lot of Khan Academy videos! I know little about chem (last time i took it was my sophomore year of high school and it wasn't an AP course), so this class is extremely difficult for me. I am REALLY struggling, but I've been watching Khan Academy videos all day today trying to brush up on...

Caitlin Dillon 3G

I live in Hedrick Summit, but i am in desperate need of help! I am down to join

CHEMISTRY COMMUNITY

Search found 26 matches

Re: Geometric isomers as line structures

sec and tert

Re: Quiz 3 Winter 2017

strength of nucleophiles vs basicity

Elementary Rate Laws

Order of ions in cell diagram

Balancing Redox Reactions: Basic vs Acidic

stability and spontaneity

Quiz 1 Study Group

irreversible vs reversible expansions

Measuring Heat Transfer (extensive vs intensive)

Re: phase changes [ENDORSED]

Re: final yield question

Re: Ka/Kb question

Re: Identifying a strong acid

Re: Coordination Number for (en) [ENDORSED]

Re: Number of Molecular Orbitals

Re: Number of Molecular Orbitals

Re: 4.61 Homework Question

Re: Energy Level differences depending on Z

Re: Dipole moments

Resonance Structures-More Stable

Re: Threshold Energy

Speed of light [ENDORSED]

Re: Rusty on High School Chem [ENDORSED]

Re: Sunset Village Study Group