CHEMISTRY COMMUNITY

Kayla Ikemiya 1E

Also, why is H20 not included in the K of the first step reaction? Is it because it's a catalyst?

Kayla Ikemiya 1E

^I agree. Shouldn't you use the K of the 3rd step reaction and substitute that in for OH-?

Kayla Ikemiya 1E

Can someone please explain how we draw the activated complex?

Kayla Ikemiya 1E

Where did this catalyzed/uncatalyzed set up come from?

Kayla Ikemiya 1E

Why isn't it ln(k2, k1)=Ea/R((1/T1)-(1/T2)? Thats what I used and got the same answer as the solutions manual.

Kayla Ikemiya 1E

Good morning! Are the functional groups that Dr. Lavelle went over in class going to be on the final as well? Just wondering because this was not part of the Kinetics syllabus :)

Kayla Ikemiya 1E

Yes, it would still be an intermediate because it helped to promote the reaction to the next step and is not a final product in the overall reaction.

Kayla Ikemiya 1E

How much of Chapter 15 will be on the final? Will we have time to cover everything?

Kayla Ikemiya 1E

Isn't it determined by the likelihood that the molecules of the reactants will collide simultaneously?

Kayla Ikemiya 1E

How do you know it has a smaller k value?

Kayla Ikemiya 1E

Hi, I noticed that Lyndon was only reviewing Electrochemistry and Kinetics. DOES THIS MEAN NO PRACTICE FINAL????

Kayla Ikemiya 1E

Can you please provide an example problem where we would have to apply this concept?

Kayla Ikemiya 1E

Never mind I see that there’s different ways to add/subtract things to both sides. I’m a brick

Kayla Ikemiya 1E

For part c, shouldn’t you get on (0.15) when subtracting the natural log of the concentrations instead of ln (1/0.15)?

Kayla Ikemiya 1E

How do you come up with the oxidizing half reduction? Why is H+ on the same side as the O2?

Kayla Ikemiya 1E

What indicates that the reaction occurs in the same solution?

Kayla Ikemiya 1E

is there a trick to finding the number of available positions?

Kayla Ikemiya 1E

how can we assume that there is no work being done?

Kayla Ikemiya 1E

Can someone please give me a better answer than the one in the solutions manual? How would you be able to tell whether the phase change would change the answer without looking at the values?

Kayla Ikemiya 1E

or because it does not have a significant impact on the whether the delta S value is positive the S(s) is irrelevant regarding which solid state it is in?

Kayla Ikemiya 1E

How do you know which solid state of S(s) to use for the standard entropy?

Kayla Ikemiya 1E

Yes, the equation was provided in the book and by Dr. Lavelle.

Kayla Ikemiya 1E

You have to cool it down to find the standard entropy of vaporization for 85 degrees not 100.

Kayla Ikemiya 1E

We use Cv because N2 is an ideal gas, so we used 5/2R because N2 is diatomic. My TA said that the answer in the solutions manual was wrong. Hope this helps!

Kayla Ikemiya 1E

Closed system. The ice pack can still exchange heat with its surroundings (keeping a sandwich in your lunch bag cold), but it cannot exchange matter.

Kayla Ikemiya 1E

When work is positive, work is done on the system. When work is negative, work is done by the system.

Kayla Ikemiya 1E

Will translational and rotational energy be on the test? I don't remember it being covered in lecture, but would just like to double check. Thanks.

Kayla Ikemiya 1E

why do you not use q=nCdT because dH is the molar enthalpy of change?

Kayla Ikemiya 1E

Thank you that makes so much sense!

Kayla Ikemiya 1E

Shoot just saw this. Thank you Kelly!

Kayla Ikemiya 1E

nevermind I understand now

Kayla Ikemiya 1E

How do you know how to find the enthalpy? I don't understand how they derived the answer in the solutions manual.

Kayla Ikemiya 1E

How do you know that q is 0 when finding the internal energy?

Kayla Ikemiya 1E

Is MO theory going to be on the final? It's in the course reader and I've seen a few questions asked about it on Chem Community.

Kayla Ikemiya 1E

104917030 wrote:correct me if I am wrong but Dr. Lavelle did say that salts would not be on the final because we did not go over that lesson in class, due to classes being cancelled because of the fire.

THIS IS NOT ON THE FINAL

Kayla Ikemiya 1E

If you name a compound using the UPAC method (bromido rather than bromo) and then name CN- with a bond on the nitrogen "isocyano" (as seen in the book) would that be considered breaking the rules? Should you call it "isocyanido" to be consistent with the UPAC naming system?

Kayla Ikemiya 1E

On worksheet 7:
1. Would we be marked down for putting the concentrations in brackets? Never heard of this...
4. Why was en put before Iodide? I thought anionic ligands were supposed to be put before neutral when writing the formula?

Kayla Ikemiya 1E

Hi, given the circumstances at hand, can you please post the solutions?

Kayla Ikemiya 1E

When trying to find the pOH, should we write out the chemical equation? Also, why do bases not react with water?

Kayla Ikemiya 1E

So the back of the book has two different ways of arriving at the fact that 2,4,6 trichlorophenol. Is it enough to just look at which compound has a greater Ka value or do we need to know that the chlorine atoms have a greater withdrawing power?

Kayla Ikemiya 1E

How do you figure out which one is more stable?

Kayla Ikemiya 1E

Can someone please explain to me what the diagrams represent and how you can tell which state of the equation it's in?

Kayla Ikemiya 1E

Why do you change iron to ferrate?

Kayla Ikemiya 1E

How do you know that the shape of (CH3)2Be is tetrahedral? I got that the central atom was Be and it had 4 regions of e- density but 2/4 regions were electron pairs.

Kayla Ikemiya 1E

I got that 3 Hydrogens are bonded to Carbon and Carbon also shares a single bond with Sulfur. Sulfur has 2 sets of lone pairs. Hydrogen is bonded to Sulfur. Carbon is the least electronegative, so it is the central atom. With this configuration the formal charge for each element is 0.

Kayla Ikemiya 1E

I got:
KCl is ionic
N2 is non polar because the structure equally shares the electrons because the same element has the same electronegativity value
SiO2 is polar

Kayla Ikemiya 1E

Why does Ge only have one unpaired electron? Shouldn't it be 3 unpaired electrons because it's 4p2?

Kayla Ikemiya 1E

For 3p, you know that n=3 and the fact that it's in the p-orbital indicates that l=1. Therefore, there are 3 values for ml. 1,0,-1.

Kayla Ikemiya 1E

How do you differentiate whether the electron is in the excited state or the ground state?

Kayla Ikemiya 1E

How do we know that the radius of the atom increases as an electron goes from n=1 to n=2? Is it because the electron is moving further away from the nucleus?

Kayla Ikemiya 1E

What sections of what chapter does test 3 cover?

Kayla Ikemiya 1E

When do we get test 2 back?

Kayla Ikemiya 1E

Can someone please explain how to start a new topic on this please? I also don't understand 30 C on the post module for Photoelectric effect

Kayla Ikemiya 1E

How do you do 29 B?

Kayla Ikemiya 1E

convert mmol to moles. Rearrange the equation M= n/v to V=n/m.

Kayla Ikemiya 1E

why do you use O instead of O2 for this problem?

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