CHEMISTRY COMMUNITY

Nicolle Fernandez 1E

Since the graph is 1/A v time and when you integrate that you'll get 1/[A] = kt + 1/[A]o, and when you plot 1/[A] against t you'll get a positive slope because k is positive

Nicolle Fernandez 1E

Zero order is A v. time with a slope of -K
First order is ln A v. time with a slope of -K
Second order is 1/A v. time with a slope of K

Nicolle Fernandez 1E

I believe he Lyndon is having its regular session because Lavelle says its all the normal sessions on top of the new ones for the final

Nicolle Fernandez 1E

When the system is doing work it loses energy which makes it negative, while if the system has work done on it it gains energy and its a positive value.

Nicolle Fernandez 1E

E naut is for standard conditions while E is for non standard conditions

Nicolle Fernandez 1E

How do we find out which two to pair in order to get the greatest Gibbs difference it was the last part of this question.

Nicolle Fernandez 1E

The equations depends on what is given, but all the formulas are given on the front sheet and those that aren't given you can derive

Nicolle Fernandez 1E

The test is cumulative but it will emphasize on new topics after test 2, but everything will be on the test.

Nicolle Fernandez 1E

The majority of the stuff on the final is going to focus on the newer topic but still have the stuff from the first tests

Nicolle Fernandez 1E

Bottleneck is when the step prior to the first step before the slow one is at equilibrium. If the first one is fast then the second one is slow there will be a buildup of products which means the reaction will go back

Nicolle Fernandez 1E

Honestly handwritten notes are the best because one will need to put notations and sometimes google takes to long

Nicolle Fernandez 1E

The unit is 1/Mol(second)

Nicolle Fernandez 1E

Yes the final will be cumulative with an emphasis on the new topics that weren't on the tests.

Nicolle Fernandez 1E

The focus is on the recent stuff, but the last two tests will be covered too but it all will be on the test

Nicolle Fernandez 1E

When temperature changes a reaction will either favor reactants or products more which means K will change.

Nicolle Fernandez 1E

I like Lyndons then I like the step up sessions because they are very helpful and allow us to learn things all over again.

Nicolle Fernandez 1E

There is an equation on the equations sheet that had both initial temperature as well as the second temperature. You would plug in the information to find the H+ concentration.

Nicolle Fernandez 1E

If it doesn’t say specifically look at the products as OH would be pOh and H3O would be pH, sometimes it will tell you specifically

Nicolle Fernandez 1E

To the end of entropy so we end right before Gibbs Free Energy

Nicolle Fernandez 1E

You can use 273 because it is an estimation but make sure you use sig figs

Nicolle Fernandez 1E

You would preferably use atm but using bar is okay bc the difference between atm and bar is so small

Nicolle Fernandez 1E

Just make sure you do the conversion correctly as 1kJ = 1000J and whatever you put the answer in is fine

Nicolle Fernandez 1E

It goes until the end of enthropy, you will have enough time to learn the topics because Lavelle teaches at a good pace

Nicolle Fernandez 1E

There are some cases where water can be a gas or a solid, but it will not be considered aqueous because it cannot be mixed with more water since it already is water.

Nicolle Fernandez 1E

When a reaction gives off heat it is exothermic, but when a reaction requires heat it is endothermic. SO for a reaction the be exothermic the change in H must be less than than 0. For a reaction to be endothermic the change in H is greater than 0.

Nicolle Fernandez 1E

Yes a pH can be negative and these are known as superacids, but we will most likely not be dealing with them.

Nicolle Fernandez 1E

They are not due but they are recommended for extra help. You can do it when you think it would be most beneficial

Nicolle Fernandez 1E

K and Kc are the same thing but K can also represent Kp

Nicolle Fernandez 1E

If it is in between 10^-3 and 10^3 then neither are favored

Nicolle Fernandez 1E

The stronger the bond the higher the boiling point

Nicolle Fernandez 1E

Tetrahedral is 440 4 bombs while square planar is 651 meaning 4 bonds and 2 lone pair

Nicolle Fernandez 1E

It depends how fast your TA gets it in the system but probably 1-2 weeks

Nicolle Fernandez 1E

So2+H20= H2SO3

Nicolle Fernandez 1E

Trigonal pyramidal because the lone pairs move the bonds closer together

Nicolle Fernandez 1E

A conjugate base of an acid would be the acid minus one hydrogen, and a conjugate acid of a base is if you add a hydrogen

Nicolle Fernandez 1E

Thanks! When are the answers going to be posted?

Nicolle Fernandez 1E

Another thing you need to know intramolecular forces like dipole-dipole and ion-ion as well as London dispersion forces

Nicolle Fernandez 1E

Can someone tell me how to draw a pi bond of p and d orbitals

Nicolle Fernandez 1E

Bonding, and molecular shapes and structures will be a majority of the test

Nicolle Fernandez 1E

It is very important to memorize the VESPR chart and all the bond angles and names because I heard that is part of every problem

Nicolle Fernandez 1E

ion-ion bond is the strongest bond because it is ionic, however an ionic bond in water is weaker than a covalent bond but still stronger than a hydrogen bond

Nicolle Fernandez 1E

If you were to draw the Lewis structure then you would be able to tell which molecules are polar or not

Nicolle Fernandez 1E

No, non-metals cannot form cations because they need to gain few electrons to complete the outer shell, so they become anions.

Nicolle Fernandez 1E

The midterm will be 8 questions, also we will have an hour and 50 minutes for the test and it will go from the beginning to Lewis acids and bases.

Nicolle Fernandez 1E

I remember him talking about doing as many homework problems as we can which is something that I will do because the more practice you can get the more comfortable you will be during the midterm.

Nicolle Fernandez 1E

There are a lot of youtube videos that put the orbitals into songs which is an easier way to memorize the orbitals.

Nicolle Fernandez 1E

To be the most stable the formal charge has to be 0.

Nicolle Fernandez 1E

Psi squared is the probability of finding and electron in an orbital.

Nicolle Fernandez 1E

I have a question on why silver's electron configuration is [Kr] 4d^10 5s^1 instead of [Kr]4d^105s^2. Thank you

Nicolle Fernandez 1E

The s-block are the elements on columns 1 and 2, the p-block are the elements on columns 13-18, and the d block are the elements on columns are 3-12. They are grouped by columns because elements in the same column has the same number of valence electrons, and blocks are determined by valence electro...

Nicolle Fernandez 1E

For this class the modules are very effective in studying because it has a lot of extra practice which makes practicing easier. Also doing extra homework problems are effective because you have the solutions you can continue working until you get the right answer.

Nicolle Fernandez 1E

Since hertz is 1/second when you multiply (J x second)(1/second) the seconds cancel out which leads to J.

Nicolle Fernandez 1E

I think reading the textbook is helpful when I do not understand the concept because it is like a reinforcement of the material because sometimes I do not fully understand something the first time. I also like to watch the modules to reinforce the textbook, and I like to review my notes as well.

Nicolle Fernandez 1E

You don't multiply the subscripts because it will change the identity of the molecule for example if you have H2O and you multiply it by 2 you're supposed to have 2H2O which is 2 water molecules, but if you also multiply the subscripts you get 2H4O which is 2 molecules of hydrogen hydrate.

Nicolle Fernandez 1E

I believe the 6.54g is the mass of the substance, then you divide it by (0.7857/1cm^3) because that is equal to 0.7857/1mL which is the density which is mass/volume.

Nicolle Fernandez 1E

Q: Did you hear about the man who got cooled to absolute zero?
A: He's 0K now

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