Any advice on chemistry??

Test Preparation
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<p>i had to relearn how to do long division by hand because of SAT II Chem. I heard someone say something about having to know which elements burned in which color. is that right?</p>

22

<p>I think... I knew them... but i don't remember much from the test: I took it in June.</p>

23

<p>pH questions on the SAT 2 chemistry are really simple. B/c you can't use a calculater, none of the questions actually require caculating logarithims. All of the questions are going to involve lower than 1 M concentrations. In the 3 practice tests I've taken (one from college board, 2 from barrons) they were all able to be solved like this: If there is one H in the acid formula (HCl, HI, HBr) you just count how many numbers are after the decimal place. So .01 M HCl has a pH of 2 (apparently..it seems high to me but that was the listed answer) and .001 would be a pH of 3. For acids like H2S04 you multiply the molarity by the number of H in the formula. So .005 M H2S04 would be calculated the same as .01 M HCl and would have a pH of 2. This also works with bases. Except instead of adding the number of digits after the decimal to 0 your subtract it from 14. So .01 M NaOH would have a pH of 12. I don't kno why this works, but it has for me so far. I did a quick search and found this chart (<a href="http://scidiv.bcc.ctc.edu/wv/acid_base/000-ph-number-line.htm%5B/url%5D"&gt;http://scidiv.bcc.ctc.edu/wv/acid_base/000-ph-number-line.htm&lt;/a&gt;) which seems to confirm my theory on calculating pH this way. I'm taking the Chem. test this saturday as well so I hope both of us have good luck on it.</p>

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<p>you will do well</p>

25

<p>i have a question for anyone who has already taken the test. in the test there are like 24 mc questions and then 18 true or false questions. Do they give you special sheet to do that? If i want to skip those to finish the last 40 or so mc questions first, do i just continue on the answer sheet?</p>

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<p>Crap!!! I just took a practice test from the barrons book. The type of questions are totally different from kaplan's test. Which book is closer to the real thing.</p>

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<p>thanks leftist</p>

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<p>Was it just me or was that test freakin hard... how do you cancel. I really want to now</p>