June 2007 chemistry

Archive SAT Subject Test Preparation
141

<p>crap I did so bad.</p>

142

<p>how do they grade T/F/CE</p>

<p>do you have to get them all right or what?</p>

143

<p>what about H2 for oxidizing…? i might have chosen that i dont know why… if it has a reduction potential of 0V what does that mean anyway?</p>

144

<p>H2 is oxidized when it forms water with O2, for example</p>

145

<p>OH MAN. why am i so dumb. lol. anyway… anything else? was the answer to the last Q … D?</p>

146

<p>Wow… I’m really nervous now. I’m pretty sure I got most/all of what I answered right, and I didn’t find the test to be hard (in terms of material), but I felt like I needed 15-20 more minutes, and I only got through question 58. Was I just too used to the AP multiple choice format? Should I have left the T/F/CEs to the end? My teacher told me not to worry too much about SAT II prepping, as it is supposedly easy. Would I have done better with prep, and do I have a shot at a 700+ score? I feel like I got a 5 on my AP test and a very high US score today, but it would be shame to cancel that because of this test.</p>

147

<p>i got that one wrong because I didnt associate oxidizing with reducing whatsoever…ugh. if you do its obviously f2. erghhhhh i put al.</p>

148

<p>cliche i remember u saying u put 70 for an answer i did too was it right?</p>

149

<p>was the answer to the last problem D?</p>

150

<p>What was the last problem again? I tend to forget all the questions after a test.</p>

151

<p>lol i said i put 140, but eloquence (i think) said that the gave you 140, so i was like hmm i put half of whatever they gave you. but it turns out they gave you 285 so 140 was what i put :/</p>

<p>and flangus according to collegeboard
<a href=“http://talk.collegeconfidential.com/showthread.php?t=352565[/url]”>http://talk.collegeconfidential.com/showthread.php?t=352565&lt;/a&gt;
the minimum required for a 700 is usually 61 for chemistry, so if you got all 58 right (counting TTCE) than high 600’s. if you weren’t counting TTCE then low to mid 700’s, if all correct.</p>

152

<p>PF3 is Trigonal Pyramidial (True)</p>

<p>The second part said that the PF3 MOLECULE has one lone pair of electrons. Isn’t that FALSE? Because counting the Flourines, there are actually 10 pair of electrons. </p>

<p>And what was the question about the mutual relationship of electrons? (Someone said something earlier.)</p>

<p>The lab question about what to use to measure out the 27 ml of liquid. What is the utensil?</p>

153

<p>They do give you 285, and you do divide in half, but that 140 was per 2 moles of H2O, so you divide again and get 70 for 1 mole of H2O</p>

154

<p>Wasn’t counting TTCE. Hopefully, I didn’t mess up anything (though my mistakes are almost always problems I never would have guessed I got wrong). How much do we lose for wrong answers?</p>

<p>Thanks.</p>

155

<p>PF3 is Trigonal Pyramidial (True)</p>

<p>The second part said that the PF3 MOLECULE has one lone pair of electrons. Isn’t that FALSE? Because counting the Flourines, there are actually 10 pair of electrons. </p>

<p>And what was the question about the mutual relationship of electrons? (Someone said something earlier.)</p>

<p>The lab question about what to use to measure out the 27 ml of liquid. What is the utensil?</p>

156

<p>I put buret.</p>

157

<p>It has one lone pair</p>

<p>



  ..
F-P-F
  |
  F

</p>

<p>It was 27.35 mL, so buret</p>

158

<p>Don’t the Flourines have pairs of electrons too? (3 each to be exact)</p>

159

<p><a href=“http://dbhs.wvusd.k12.ca.us/webdocs/VSEPR/LewisStructure-PF3.GIF[/url]”>http://dbhs.wvusd.k12.ca.us/webdocs/VSEPR/LewisStructure-PF3.GIF&lt;/a&gt;
so it’s TTCE right?</p>

160

<p>yea, thyis test was definitely harder than the practice tests. lots of trues for the first column? and a lot of TTCE’s. hopefully no calculations errors -_-</p>