<p>so, what was the right answer on the colors question? clear to purple, or were other colors involved???</p>
<p>for the electrochem question, i had clockwise for the electron movement and a negative value for delta G.</p>
<p>:(
I got all the difficult questions right and missed the geometry for SO2
why wouldn’t it make sense that S would have two single bonds with O?</p>
<p>There wouldn’t be enough electrons to give one of the atoms an octet.</p>
<p>crud… I got the color of the solution wrong, I thought it turned pink since that’s what happened in our lab (must’ve been an altered version that was on the FR).</p>
<p>Yes, SO2 displays resonance.
Yes, I used Henderson-Hasselbach, and got pH of 3.35 or something.</p>
<p>I could never get VSEPR, so I bombed that question asking for the geometry… what was it BTW? I guessed T-shaped…</p>
<p>BTW, for the middle rxn, I got H+ + CaCO3 –> Ca2+ + H2O + CO2.</p>
<p>It was trigonal planar?</p>
<p>IF3 is T-Shaped. 3 Bonding Pairs and 2 nonbonding pairs of electrons, falls under the “Trigonal Bipyramidal” Family.</p>
<p>SO2 has resonance. (I put because of the coordinate covalent bond, so i missed that)</p>
<p>For Electrolysis, delta G MUST be positive and the voltage negative.</p>
<p>I screwed up, but hopefully I can salvage a 4.</p>
<p>for the electrolysis problem, how is E negative?</p>
<p>Re: IF3 and geometry: Oh thank goodness! </p>
<p>E is negative because it’s an electrolytic cell, not an electrochemical cell. Thus the reaction is nonspontaneous, and E<0, G>0.</p>
<p>the good thing about electrolysis questions is that you can easily fix your mistakes if you thought otherwise.</p>
<p>the hard part is finding the word “electrolysis”, reading it over 50 times, and then realize too much training conditioned you for failure.</p>
<p>at least that’s what happened to me ^^. I think I missed maybe 20 pts on FR total. #5 brutally raped me.</p>
<p>How many points total for FR?</p>
<p>Would the answer “trigonal bipyramidal” be acceptable then?</p>
<p>Oh, and I think I forgot the +2 on the Calcium in the limestone reaction…and I think the reactions were some of the few pts that I got…</p>
<p>so… anyone’s answer line start after 6e? so there wasn’t 6f or 6g? or heard your friends say anything about not seeing the last two questions?? thanks</p>
<p>on num 2, I assumed that delta H was kJ/mol reaction. not per mole NF3.
Is that ok?
And on the electrochem problem, was the direction clock-wise?
I missed part b of Num 2, part c of num 5, part b and c of Num 6.</p>
<p>Do I have a shot at a 5, considering I got at least 50 points on the MC section.</p>
<p>Is there like a formula you can use to see what your composite score would be? I know someone gave me one for AP Lang (I think it was piccolojunior) so there must also be one for Chemistry.</p>
<p>it seems that for one of the questions, many people agree the answer to be</p>
<p>iii)5(55.85)MV/g</p>
<p>That’s for the mass percent where it asks you to write it as an expression with M and V. But don’t you have to multiply by 100, since its a percent, and not a decimal ratio?</p>
<p>For the question where it asks you to calculate the F-F bond energy, I got 141. However, I wrote at the top of the page, incorrectly, that it was energy of products- energy of reactants. I got the right answer, though, so do I get full credit?</p>
<p>SAT: I wrote 5(55.85)MV/g x 100, because no x100 gives a decimal…you want mass PERCENT. So I believe youd need a x100 somewhere.</p>
<p>I rounded everything to 3 SigFigs, that should be okay for just about every answer right? Considering they give credit for any answer that is + or - 1 digit.</p>
<p>Also, do you guys remember getting 301 for anything?</p>
<p>for the electrochem question … the answer is that G is positive and E is negative … but i got the answer other way around … my teacher told us that graders do not take off points for next parts of FR question if they already took off for the mistake on the first one … do you think it is true for the electro question?? cuz i thought copper was getting oxidized … i messed up the entire problem … did it in correct method but just opposite …
what do you guys think? i get the entire problem wrong ??</p>