AP Chemistry 2012 MC Answers

<p>No money needed, I’ll see what I can do.</p>

<p>Now you are making me feel bad. -.- lol</p>

<p>Dude, hypnotoad107, you are soooooooooo awesome. My email is ktz17***********.</p>

<p>Ha! Not necessary, you can check my work :)</p>

<p>What do you mean?</p>

<p>Oh do you mean that you’ll post the word doc (if you make one) on here?</p>

<p>You mean I can check your work. (If yes) No bro, seems like you got almost all of them right. :)</p>

<p>yo guys and girls what are the chances on the frq i completely guessed what the hydrocarbon was c3h8 , and got it right , man im lucky</p>

<p>if I think i got round a 66% on Ap chem multiple chice, what kind of FRQ score would I need to get a 5?</p>

<p>51ish.
@Bigd2cc- Idk bro. It depends on the reader. May be they will only take off points on that part.</p>

<p>Okay, so if the equations were indeed right, I would have gotten an 11/15 on #4! lol.</p>

<h1>1, I used the wrong ml, so I got .0125 mole instead of .01, but I only got that one section wrong because I was consistent with my values. I still did mm = m/n lol.</h1>

<p>FRQ 1 -> Probably missed c and f. 6-7/9 probably?</p>

<p>FRQ 2 -> I didn’t get the mass of the C3H8 or # mols of hydrocarbon (A and E) So I would imagine on that problem, I would have gotten 7-8/10.</p>

<p>FRQ 3 -> I did pretty bad. I missed b (I did products - reactants) so I got -49 unfortunately. But I did maintain consistency and said it was exothermic to the insulation and therefore the temperature goes up because it gets hotter. So I got c correct hopefully. I just played around with the ln formulas, and hopefully I got those right and I did say the second order reaction was curved! :D</p>

<p>Probably a 4-6/9.</p>

<p>FRQ 4 - I didn’t balance the first one, it was too weird for me! haha. But I did say it was gonna bubble so I got an 11/15 :/.</p>

<p>FRQ 5 - I drew the structure wrong, I miscounted, but that’s it and I got the rest right! So I’m hoping for 7-8/9.</p>

<p>FRQ 6 - Probably the one I bombed. I did get the reactivity of metals, the standard potentials and copper, but I did not get e(i) or e(ii) probably because I didn’t use the Nernst equation nor did I get the half cell reaction correct. 4-5/8!</p>

<p>And I think it was a solid 45-55 on the multiple choice, but I don’t what I got so meh :/.</p>

<p>Answers: Pared down the essays a bit, definitely not 100% they are all right but pretty confident. Feel free to correct me if you see I made a mistake.
<a href=“https://docs.google.com/document/d/1z2OeB88EdaEguADJFu4uDwG8VTSNPN8O6ftE0VT_xmc/edit[/url]”>https://docs.google.com/document/d/1z2OeB88EdaEguADJFu4uDwG8VTSNPN8O6ftE0VT_xmc/edit&lt;/a&gt;&lt;/p&gt;

<p>DUDE YOU ARE MY HERO @hypnotoad107!!!</p>

<p>@doc: let me know if you need any further explanation, typing math crap out is a pain.</p>

<p>You are probably the kindest person I’ve ever met.</p>

<p>On 6e, I doubt that saying something about Q and the Nernst equation would suffice for an explanation, but that just might be me… I used logic and moved it through XD</p>

<p>FRQ 1 : 6-7/9 (only missed f)
FRQ 2 : 4/10 <—LOL (missed c-e)
FRQ 3 : 6-7/9 (overthought both c and d)
FRQ 4 : 15/15
FRQ 5 : 7/9 <—never know what they’re looking for (missed ei)
FRQ 6 : 7/9 <—same as 5</p>

<p>MC: an easy 58-63/75</p>

<p>So, if all of this is right and stuff, I got a 5, assuming the curve didn’t randomly shoot up.</p>

<p>Can you use a justification other than the Nerst equation in the last part of number 6? For example could you say the formation of precipitate would reduce the products so equation would shift to right increasing electrons formed? (i put something more clear but along those lines)</p>

<p>@cantconcentrate: a mathematical explanation is always acceptable, it means you have a legit understanding and it absolutely can’t be BSed. You do however have to know why Q increases or decreases. ii) PbSO4 precipitates out lowering the Pb2+ concentration and causing a decrease in Q iii) as reaction proceeds right, Pb2+ inc and Cu2+ decreases causing an inc in Q and dec in Ecell</p>

<p>That’s pretty much what I put haha XD Alright, that works.</p>

<p>Hypnotoad, you will end up with like a comp. score in the 130s. haaha</p>