May 2013 SAT II Chemistry

Test Preparation SAT Subject Test Preparation
161

<p>So for the lab equipment questions the buret was for volumetric calculations, the scupula was for transferring NaCl, the crucible was for heating at constant mass, what else?</p>

162

<p>So three questions.

  1. Wasn’t the kinetic molecular theory one the one where the particles were colliding and at the same time hitting off of the container according to the ideal gas law
  2. For the one with mmHg and the lab with the pressures I put you would need to know the identity of the gas because the other measurement just said mm and would need to be converted to mmHg
  3. So for the acid base titration which one was it? i think i put pipett</p>
163

<p>This is regarding the alpha, beta, and gamma problem on the test.</p>

164

<p>@gstrubes96 can u elaborate on the lab with pressures question? I don’t recall that one</p>

165

<p>That lab question the answer was Crucible you don’t use that in a titration lol</p>

166

<p>Damn i thought so. and @justin5585 it was the one where people said they just added the pressures and got 780. It had like a diagram of the setup.</p>

167

<p>I’m pretty sure you had to subtract thee pressures, rather than add them.</p>

168

<p>but one of the pressures just said mm and not mmHg so wouldn’t you need to convert it to mmHg</p>

169

<p>I think the 30mm measurement was the height of the mercury in the tube, so it would be mmHg already.</p>

170

<p>But… The root mean square velocities are the same not the speeds of every individual molecules. Overall averages are the same. I put T F for that one.</p>

171

<p>ok that makes sense. i feel like i could’ve done better if i worked just a little faster. i left like 5 blank</p>

172

<p>I put 720 for the mercury one</p>

173

<p>For the alpha, beta, and gamma problem was the charge on the top bar positive or negative?
was it like this: <a href=“http://w.g.seeley.tripod.com/physics/q2q/images/spectr2.gif[/url]”>http://w.g.seeley.tripod.com/physics/q2q/images/spectr2.gif&lt;/a&gt; or the other way around?</p>

174

<p>It was flipped upside-down.</p>

175

<p>What was the answer to the problem with the saturated solution of CaSO4(s) <–> Ca 2+(aq) + SO4 2-(aq)? I think it gave several salts as options and asked which would shift the equilibrium to the left.</p>

176

<p>So then shouldn’t the order be beta, gamma, alpha?</p>

177

<p>Yeah; beta went up, gamma went straight, and alpha went down.</p>

<p>I think the answer @zwitterio was Na2SO4</p>

178

<p>So guys generally on a good curve what is -5 or 6 on the chem sat?</p>

179

<p>Darn. The mercury question was 780 wasnt it?</p>

180

<p>Pretty sure it was 720.</p>