CHEMISTRY COMMUNITY

Eruchi Okpara 2E

I try to tell Chemistry jokes, but there's no reaction.

Eruchi Okpara 2E

Has Lyndon posted his practice exam for the final exam?

Eruchi Okpara 2E

For the final exam, will the test specify between whether we need to use bond enthalpies or standard enthalpy reaction?

Eruchi Okpara 2E

For the final exam, will we need to know how to derive the Van't Hoff equation?

Eruchi Okpara 2E

Has Lyndon posted his final review sheet? I know he usually makes a practice exam, but I haven't seen anything about it yet.

Eruchi Okpara 2E

I have the same question. I know that a lot of people just do the homework problems for practice, but are their any other methods for preparing for the exam?

Eruchi Okpara 2E

Salt bridges and porous disks both allow for a flow of ions from anode to cathode.

Eruchi Okpara 2E

For the cell diagram, I don't think that when using an inert solids you have to put it on both sides. I think that as long as its include on the right side of the cathode then it implies that it is included everywhere. But that's only for inert solids.

Eruchi Okpara 2E

Is Pt(s) the only inert gas that we can use?

Eruchi Okpara 2E

I had the same question, because I know how to find cell potential using the potential (E)=E(cathode)-E(anode).However, I'm not sure about the others?

Eruchi Okpara 2E

Pretty much what everyone else said, But I think its primarily the aqueous state that goes in the middle (if there is one).

Eruchi Okpara 2E

I believe that you can use both Pt(s) and C(gr).

Eruchi Okpara 2E

Is there a way to convert from atm to barr, when dealing with partial pressure?

Eruchi Okpara 2E

So how do we know when to use either 3/2R or 5/2R?

Eruchi Okpara 2E

How do you know which bonds need to be broken?

Eruchi Okpara 2E

Additionally, when do you know whether to use q or delta H?

Eruchi Okpara 2E

When solving for the enthalpy of a reaction, how do you know which bonds are supposed to be broken?

Eruchi Okpara 2E

Are we expected to automatically know all the lewis structures/resonance structures in order to solve bond enthalpy problems?

Eruchi Okpara 2E

There is a difference in the conversion formula that is used for both. I think its a difference in the R constant that is used for the formula PV=nRT.

Eruchi Okpara 2E

If they just say "k" do we assume Kp? Because in one problem in the textbook they used K and then it was Kc. I think you can assume Kp when both reactants and products are all in the gas phase, or if told to find the equilibrium constant in atm. But I think that it might be safe to simply...

Eruchi Okpara 2E

ICE tables can be used for both, but I think there are specific cases in which if you are supposed to be solving for partial pressure, or given the units atm, then you might have to use the formula PV=nRT to convert to pressure.

Eruchi Okpara 2E

Can deprotonation still be found if we are given initial concentrations for both the reactants and products?

Eruchi Okpara 2E

When solving for the percent deprotonation, is it always going to be the value you got for X (from the ICE table) divided by the initial concentration given?

Eruchi Okpara 2E

When using ICE tables, how do you know when its better to use the quadratic formula to find X or the 5% rule?

Eruchi Okpara 2E

Basically, yes; whenever you set up the ICE table, you start by assuming that the reaction hasn't taken place yet. Therefore, there won't be any products formed yet, so their initial concentrations are 0. So if we assume that the reaction hasn't happened yet, is that why for anything that has an in...

Eruchi Okpara 2E

I'm still confused on how to find the change in molarity, can someone explain please? Does the number in front of the X come from the coefficient that is in front of the reactant or product?

Eruchi Okpara 2E

Thank you Joyce!!!

Eruchi Okpara 2E

Can't you also determine which compound has a higher/ lower boiling point by looking at branching?

Eruchi Okpara 2E

I don't think there is a difference. Some of the names in the book are slightly different because the IUPAC Name Convention recently changed some of the names. However if you check the coordination compound list on Lavelle's website, it will show you which ones are the same.

Eruchi Okpara 2E

Thank you so much!!!

Eruchi Okpara 2E

Is the answer automatically wrong if lone pairs are not separated from the shared pairs of electrons? for instance, if something has 3 shared pairs of electrons and 2 lone pairs, can it only be written as AX3E2 or can you write it as AX5?

Eruchi Okpara 2E

How would one combine s and p orbitals to create a sigma bond or a pi bond?

Eruchi Okpara 2E

So we are always supposed to include the coefficient in our hybridization answer?

Eruchi Okpara 2E

And how would you calculate the bond lengths for 2E 13?

Eruchi Okpara 2E

In terms of the 7th edition, would the questions for 2E help the most? For practicing how to draw VSEPR?

Eruchi Okpara 2E

What chapter are we doing this week for the 7th edition?

Eruchi Okpara 2E

That was sodium funny.

I slapped my neon that one!!!

Eruchi Okpara 2E

705088777 wrote:If we have a chem discussion that day will it be canceled too?

And if our discussion is canceled would we just turn in the homework when we come back or on whatever day we have our fist class that week?

Eruchi Okpara 2E

Will VSEPR be on the midterm?

Eruchi Okpara 2E

Are we only allowed to use pen on the midterm like we did on test 1 and 2?

Eruchi Okpara 2E

Thank you so much Lyndon!!!

Eruchi Okpara 2E

There are also a lot of office hours (step-up, drop-in, and workshops) that are up on the hill, which are a very convenient for students living on campus.

Eruchi Okpara 2E

Does anyone know what the sapling access code is for? Like, is having it actually helpful?

Eruchi Okpara 2E

I think you have to use sub topic to create a new topic.

Eruchi Okpara 2E

I have the same question. And I was also wondering if test 2 would be as long as test 1 was?

Eruchi Okpara 2E

Thank you for the advice!

Eruchi Okpara 2E

Just for clarification: everything that was covered during Friday's lecture will be included in the test?

Eruchi Okpara 2E

Score for homework 1 should be given out when the homework is passed back on the day that your discussion takes test one. However, I'm not sure when our grades are updated online.

Eruchi Okpara 2E

Does anyone know when we will be getting our scores back from test one?

Eruchi Okpara 2E

Is signing up for Sapling required for the class?

Eruchi Okpara 2E

So are the quizzes extra credit or not? I plan on doing them anyway, but I would just like to know.

Eruchi Okpara 2E

If I can't make it to office hours with Professor Lavelle (because of conflicts in my schedule), is there any way I can set up appointments?

Eruchi Okpara 2E

Do I need to buy the 7th edition if I already have the 6th?

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