CHEMISTRY COMMUNITY

Ashley Kumar 3F

I don't think there will be tons of naming, but we don't know what he's gonna throw at us so unfortunately the only way to be really prepared for anything is to memorize the entire worksheet he emailed us

Ashley Kumar 3F

If the reactant is e- deficient, then its a lewis acid, and if it has extra, then its a lewis base :)

Ashley Kumar 3F

I would just study the ones from lecture like myoglobin, hemoglobin, and cisplatin!

Ashley Kumar 3F

I believe a salt is a strong conjugate base fs the original acid and it is a strong conjugate acid if the original base is weak

Ashley Kumar 3F

pKa and Ka are used to help determine which acid is stronger than the other. They are called the dissociation constant

Ashley Kumar 3F

Sadly yes I think we do

Ashley Kumar 3F

I’m not sure but there are 83 hours of review sessions this week which should help.

Ashley Kumar 3F

I don’t think we need to know exact bond lengths. Probably just need to know what bond length is and which molecules have shorter or longer bonds

Ashley Kumar 3F

Honestly just breathe deeply in though your nose and out through your mouth for a minute or so it really helps me calm down.

Ashley Kumar 3F

He said he doesn’t curve tests, but I think he will curve the class.

Ashley Kumar 3F

SO2 would have the higher boiling point because S has more electrons making it have higher attractive forces making the dipole-dipole interactions stronger in SO2 than in O3

Ashley Kumar 3F

A ton of people say that 14a is the most difficult for them but others say they hated 14C. It really just depends on the person and what comes easily to them.

Ashley Kumar 3F

It is cumulative

Ashley Kumar 3F

You must memorize them

Ashley Kumar 3F

AX3E2 is the t-shaped molecule. AX4E is the see saw shape.

Ashley Kumar 3F

its areas where electrons are most likely found so yes it does include lone pairs

Ashley Kumar 3F

VSEPR is what we use to determine the shape of a molecule to limit repulsion

Ashley Kumar 3F

yes all molecules have them

Ashley Kumar 3F

we haven't really learned any equations or anything so mostly conceptual based i believe

Ashley Kumar 3F

it will be on everything from the midterm on meaning 2D to the lecture on friday

Ashley Kumar 3F

It depends on how long the bond length is

Ashley Kumar 3F

I suppose we should remember the electronegativity trends but probably not bonds specifically.

Ashley Kumar 3F

Nope it is not cumulative. It only tests us on material past the midterm. The final however is cumulative

Ashley Kumar 3F

The d orbital can account for the extra electrons which is why elements from period 3 and beyond can have an expanded octet

Ashley Kumar 3F

A dipole moment is not the same a dipole because it is only temporary

Ashley Kumar 3F

Remove them from the 4s orbital before the 3D orbital unless it is an exception of the rule such as Cr where the electron configuration is odd, but usually you always take it out of 4s first.

Ashley Kumar 3F

When empty, the 3D orbitals energy is higher than 4s but when it fills, the energy lowers hence why you put 3D before 4s

Ashley Kumar 3F

Shorter bonds are stronger. Single bonds are the longest and weakest whereas triple bonds are the shortest and strongest.

Ashley Kumar 3F

When I went to a review session, the TA said that all the elements in the same group as oxygen follow the same exception as oxygen but it is just not as pronounced.

Ashley Kumar 3F

Most often it is the atom with the least electro negativity and has the most valence electrons. :)

Ashley Kumar 3F

Not anything that Dr. Lavelle has mentioned so far

Ashley Kumar 3F

I believe there is a test bank on chemistry community you could check out

Ashley Kumar 3F

I believe it is everything we have learned so far. So basically from Fundamentals until now

Ashley Kumar 3F

He hasn't mentioned anything on adding more video modules. Probably best to email and ask him

Ashley Kumar 3F

Dr. Lavelle did not say anything about needing to know bond lengths so I doubt it

Ashley Kumar 3F

3 nodal planes

Ashley Kumar 3F

You would always remove the electron from the higher energy subshell

Ashley Kumar 3F

He won’t but it’s nice to know what they look like to visualize them

Ashley Kumar 3F

They will give us a sheet with the constants on them but I’d say it’s probably a good idea to start remembering them to get ahead.

Ashley Kumar 3F

Always the same number!

Ashley Kumar 3F

Most of the time they will give the actual yield in the problem. If it is not given, then they probably will not ask for you to calculate the precent yield unless other information is given.

Ashley Kumar 3F

Not for this test, but when we are given the test, most of the basic numbers are on a little "cheat sheet" on the front of the page

Ashley Kumar 3F

You should probably learn basic names like sulfate which is SO4 because it comes up pretty often.

Ashley Kumar 3F

I would say convert it to an integer

Ashley Kumar 3F

I had this same question and no we do not have to, at least for the test this week.

Ashley Kumar 3F

First things first, you must find out how many grams on KNO3 are on 510g. So to do that, you must divide 5.45 by 100 which gets you 0.0545. Then you multiply that by 510g. This tells you how many grams of KNO3 is in the 510g solution which is 27.8g . So then for the second part of the problem, you w...

Ashley Kumar 3F

My TA said that we do not need to know the names of the compounds yet, they will be given to us on the test

Ashley Kumar 3F

Personally, I just do 15.999 but in my discussion my TA just rounded to 16 so I think it should be fine.

Ashley Kumar 3F

114 and 114. have the same number of sig figs but adding the "." does seem a little redundant so I'd say stick with 114. But 114.0 is not the same as 114 because it has 4 sig figs.

Ashley Kumar 3F

We turn in our 5 problems that we choose to do this week (week 1) on Friday, but every week after that, we must turn in our homework into our TAs during your office hours :)

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