Official 2011 AP Chemistry Thread

<p>I would pull an all-nighter and just go right to bed after the exam if I didn’t have AP Psych on the SAME DAY</p>

<p>@leadlol:
You’re the best, thanks.</p>

<p>I think I’m going to bed at 12/12:30. . . hopefully I finish the rest by then.
SCREW BUFFERS.</p>

<p>Does anyone have lists of colors and solubility rules?</p>

<p>chicken - the weak parent of the two is the one that we worry about there. Na forms a strong base and propanoate forms a weak acid, so you don’t worry about Na (The strong parent)… I don’t really know how else to explain it.</p>

<p>The predicting reactions free response (#4) is the most involved part – it actually requires in-depth thinking and analysis about compounds and stability. The portion in PR is great for that.</p>

<p>Puggly! It’s great seeing someone familiar from last year’s gov exam…or was it human geo?</p>

<p>supercuber - back a page or two</p>

<p>lol I am freaking out. Exactly 12 hours left.</p>

<p><a href=“Supporting Students from Day One to Exam Day – AP Central | College Board”>Supporting Students from Day One to Exam Day – AP Central | College Board;

<p>6.c)
What . . . why are they both double bonds? (The OR part)
From the Lewis dot we see that’s it’s a single and a double . . . ?</p>

<p>Ugghhh I forgot all about IMFs</p>

<p>ans. d
21. Which of the following substances experiences the strongest attractive IMFs?</p>

<p>a. H2
b. N2
c. CO2
d. NH3
e. CH4</p>

<p>ans. c
32. Which of the following aqueous solutions has the highest boiling point?
a. .01m NaOH
b. HF
c. Na2SO4
d. KC2H3O2
e. NH4NO3</p>

<p>All are 0.01 molal</p>

<p>^ 21 is d) because of hydrogen bonding. The rest only have dispersion forces.</p>

<p>32 is c, because it dissociates into three different ions. The rest dissociate into two.</p>

<p>12 hours left… I am SO ready for my 5</p>

<ol>
<li>d -> NH3 has Hydrogen Bonding.</li>
<li>c -> Van’t Hoff Factor is 3 - meaning there are 3 molecules to get in the way when it tries to boil.</li>
</ol>

<p>and I am SO ready for my 2 or 4 :(</p>

<p>Thanks,</p>

<p>If lewis dot structures are in the FRQ im so screwed. How do you know the other ones have dispersion/dipole-dipole?</p>

<p>Dispersion forces happen in non-polar substances, and nothing else can (I believe).</p>

<p>In case anyone missed my question on the last page about SO2, would anyone mind taking a look?</p>

<p>If the dipole moments cancel out the molecule is nonpolar. If they don’t it is a dipole. If its nonpolar its strongest forces are dispersion forces. Ions and Hydrogen bond molecules are stronger than dipoles though.</p>

<p>EDIT: Talking about Abrayo’s question — WHY DON’T QUOTES WORK?
Does anyone else know?
Maybe it’s just a mistake?
Very doubtful though, as they would have caught that in grading before they were released online.</p>

<p>Although this is subjective but I am just curious for those that have taken or taking AP Calc BC and AP Chem, which would you say is more difficult. I find Chemistry fairly easy and well most likely get a 5 and I find Calculus BC really easy too but our teacher sucked this year and we didn’t even get to cover Series/Parametric/Polar/Vectors plus no practice tests. Otherwise I would probably get a 5 although I did self-study some of it. </p>

<p>I digress, so eliminating ‘lousy-teachers’ which exam would you say is harder.</p>

<p>skateme- it was Human Geo. :slight_smile: I remember you.</p>

<p>SO2 can be doublebonded on both sides, or singlebonded and doublebonded on two sides.</p>