Chemsitry SAT II Thread--How'd it go?

Archive SAT Subject Test Preparation
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<p>I did so horrible on this. I have no idea why. I studied so hard for it. I was the best student in honors chemistry last year. I got a 105 on the final! and I just completely bombed the SAT. I feel like such an idiot. </p>

<p>Ugh. -_-;</p>

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<p>take AP and then take it again</p>

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<p>I can’t… college applications are due in January. I’m screwed. Blah.</p>

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<p>oh ure a senior…some schools allow scores from the jan 27 test so try then</p>

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<p>Yes, density was an option. It said “Its density is less than water”. Everything else was a chemical property. Density was the only physical.</p>

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<p>how many t t ce?</p>

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<p>I got 5 T.T.C.E</p>

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<p>i got 4 but i like omited 4 or 5 of the 15. did you get ccl4 as a ce?</p>

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<p>i’m pretty positive that it was pressure times temperature with volume constant (PV = nRT) so it’s a linear graph… or (or it might have been volume times temperature with pressure held constant) because I specifically remember thinking how ridiculously easy it was… although i skipped one of the problems in that set… haha</p>

<p>I got about 4-5 CEs… umm

  1. the very first one
  2. the problem about H2SO4 and sulfur… was CE
  3. … forgot
  4. … forgot</p>

<p>for last set of problems… i got 0.010 M and 0.002 or something (it was like 20 percent concentration of 0.01 M… so .20 x 0.01 = 0.002)</p>

<p>what else…? I’m trying to remember as best as possible.</p>

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<p>all of the following increases the entropy EXCEPT
answer: condense vapor</p>

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<p>oh yea… the xH3 and XCl4 and Xsomething is phosphorous</p>

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<p>the set of problems that ask for the type of bond
H-H (we all agree it’s s-s)
H-Cl (we all agree it’s s-p)
C2H6 (i don’t agree it’s sp^3… i put p-p because the p orbitals from both carbons are connected)</p>

<p>can someone explain to me why it’s sp^3? i thought of AB4 => hybridization sp^3, but how can it be sp^3 - sp^3 when they both share each other’s carbon… and it’s not consistent with the past answers (H-H is a s-s… like the bond between H and H… while H-Cl is a s-p… since Cl’s p orbital connects with H’s s orbital… so my reasoning was that since the bond between the carbons are for sure, p-p… like the actual bonding between the 2 carbons is where the two p orbitals meet, i put p-p…)</p>

<p>what do you think</p>

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<p>“oh yea… the xH3 and XCl4 and Xsomething is phosphorous”</p>

<p>Are you sure? Why did I get aluminum?</p>

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<p>What are the CE’s</p>

<p>so for lab one, you swirl it because of vapor pressure something (choice A) rite?</p>

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<p>mm because phosphorous is +5 OHH sorry it was XCl5 (so -5 oxidation… and +5 for phosophorous… and then PH3 works as well… i forgot the 3rd one)</p>

<p>Yea… I’ll remember the questions if someone gives me couple answer choices uhh which lab one?..</p>

<p>oh yea, vapor pressure of 0.040 something and 0.060 with a total pressure of 600 mm Hg… what’s the partial pressure of the 0.040 compound… it’s 400 since 2/3 * 600</p>

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<p>I got 4 TTCE</p>

<p>I use the constant function for the PV/P relationship, because anytime the value of P goes up by some factor, it cancels out. </p>

<p>Octane does not dissolve;
Alpha Particle was used Twice;
The other was electron;
for Acid/Base Combonation was the one where it went up very steep and tapered off because it was the equivalence point of a titration;</p>

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<p>^ post, was the very first question about the alpah particle a t,t,ce?</p>

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<p>does anyone remember any more problems…?</p>

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<p>

</p>

<p>Look at each carbon separately. Each one is bonded to four other molecules. Doesn’t matter that the carbons are bonded to each other. Each one is still sp3.</p>

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<p>There was a question: Which of the following is the strongest bond?
C-O
C-C
C=C
C-H</p>

<p>It’s C=C, right?</p>