<p><a href="http://apcentral.collegeboard.com/apc/public/repository/ap08_chemistry_frq.pdf%5B/url%5D">http://apcentral.collegeboard.com/apc/public/repository/ap08_chemistry_frq.pdf</a>
Discuss...!!!</p>
<p>My class already discussed it..knew what I got wrong...stupid lab question...</p>
<p>would u mind putting upt the answers the nsince 48 hours have passed?</p>
<p>sweeeeeeeeeeeeeeet! who wants to talk about answers now?</p>
<p>i do!!...what did u get?</p>
<p>On 6b I said it was because of steric hinderance. Was I right?</p>
<p>I said H-Bond.</p>
<p>6b) I said that polar bonding (the molecule to the right is polar) is stronger than London dispersion forces (the molecule to the left)</p>
<p>ethanol has dipole dipole but in the dimethyl ether the two methyl groups cancel out the dipole... i explained it more in depth on the exam however i was in robot chem mode then.</p>
<p>On 1A when it asked to write the equilibrium constant expression, I used brackets instead of parenthesis. Do you think it matters that much? Brackets symbolize concentrations instead of pressures, but do you think they'll care that much?</p>
<p>Don't worry Ptranium, The College Board may be cheap, but they are not that mean. I am 95% certain that they would not take points off for that.</p>
<p>stephennnn...i wrote same thing as you for explanation
what was answer for 2d and 2 e about precipitation?
and what was the answer for lab question about hydrate</p>
<p>i said h bonds also. ethanol has h bonds (O and H) while dimethyl doesn't.</p>
<p>Hopefully you're right. I'm just so use to using brackets for writing K that I just used it on the test.</p>
<p>yeh i think either H bonding..or polarity works for that one</p>
<p>You could have also used the pressure notation, P^2co / Pc*Pco2</p>
<p>what was 4 ba also?</p>
<p>i talked about filtration.</p>
<p>and as for the other part i think my mass percent was like 62 or 61.9 or something like that.</p>
<p>stephenn, your mass % seems to be right. Mine was 61.8ish.</p>
<p>how did u do that?</p>