<p>CO2 isn’t particularly soluble anyways (even though it is technically an acidic anhydride) and can be collected using water-displacement. (At least I think it can) I don’t think it’ll be a huge deal. Secondly, CO2 is a much heavier atom (48g/mol vs. 28 for N2 and 36 for O2) which means that the London Dispersion forces for it will be slightly stronger which in turn allows it to dissolve better in polar water.</p>
<p>What simple facts should we know? I noticed that the blue book expects us to know such facts as:</p>
<p>O3 blocks the dangerous UV rays from the sun.
NaClO is used in bleach.
NaHCO3 is used in baking soda.
<em>I wonder, what other “basic” (chemically) household products should we know?</em>
Not all indicators are colorless in basic solution.</p>
<p>What other facts should we know?</p>
<p>Do you have to get all 3 parts of each relationship analysis right to get that point or …?</p>
<p>Yes, you have to get all 3 parts of each relationship analysis right to get the point.</p>
<p>Hey, can anyone tell me what facts I need to know? (Look two posts above this one to see the details)</p>
<p>strong base hydroxides (NaOH, KOH, etc) are used in lye/caustic soda</p>
<p>and yup, u need to get all 3 parts right.</p>
<p>We only need to know two indicators right?
Phenolphtalein: pink in basic solution, colorless when neutral/ acidic
Litmus: red in acid, blue in base</p>
<p>Also, my teacher said that if we want to titrate something, we should use the normality instead of the molarity in the MV = MV equation. Is she right?</p>
<p>I always do it by # of Moles/Litre of OH times Volume = # of Moles/Litre of H times Volume because there can be a diprotic or multiprotic tirtration with monoprotic titrant.</p>
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<p>I think the relationship analysis answer key may be wrong. I got at least 10 wrong on that section alone, according to the answer key, and I know some statements were true when the answer key said false. Can someone work through these questions?</p>
<p>Anyways, I didn’t improve at all since last night. Now I’m kinda panicking. Ugh… I really don’t feel like retaking this in September.</p>
<p>EDIT: Nvm, the next SAT is in October.</p>
<p>What is the lowest raw score for an 800?
According to Barron’s, 75-85 is 800.
The last practice test I took I got a 75, so I thought that would mean an 800, but I looked up other sources online that say a 75 is a 780 or 770.</p>
<p>I really don’t think it’s a 75 raw for an 800. I think that’s like a 760.</p>
<p>I don’t think -10 in a real test would still be 800. Nevertheless, -10 in Barron may still be a good sign for getting 800. In a real test, I think -3 to -5 would be the limit for 800 in Chemistry. -10 would be likely around 760 as RAF1940 said.</p>
<p>Last day before the test. How are you guys studying?</p>
<p>I’m having a bit of a freakout now. I just did a Barron’s test, my last one and I scored a raw score of 80, which is loads lower than what I normally do…</p>
<p>Sparknotes. I haven’t studied at all, but practice tests are putting me solidly in the 700s. Hopefully cramming today will push me into 750+ easily.</p>
<p>@yangmaster</p>
<p>I’m fairly sure the relationship analysis is 95% wrong. There’s no way I missed 5 questions in a row. And certain answers make absolutely no sense.</p>
<p>I took the practice test in the official guide and got a 740, should’ve gotten a 760 or 770 but made really dumb mistakes. I’m perfectly fine with a 740 on the real thing, so I guess I’m just going to study that practice test and maybe look at some review materials online.</p>
<p>Any compounds and their formula that we have to remember?</p>
<p>Hmm…what other facts do we have to know? I’m pretty surprised nobody gave the fact that NH3 is used in fertilizers, among other things.</p>
<p>Also, what is the difference between a potentiometer and a voltmeter?</p>
<p>Does anybody know how much higher I will score on the real test if I got a 740 on Barron’s 11th edition practice test 4 and a 720 on practice test 2?</p>
<p>In general, I’ve heard that you’ll usually score about 50 points higher on the real thing.</p>
<p>^Well, I sure hope so.</p>
<p>I’m confused on a question here:</p>
<p>…Na3PO4 (aq) + …Mg(NO3)2 (aq) → …Mg3(PO4)2 (s) + … NaNO3 (aq)
58. Equal volumes of 0.10 M sodium phosphate and 0.10 M magnesium nitrate are mixed according to the unbalanced reaction equation above. When the reaction is complete, what is the concentration of sodium ions in the solution?
A. 0 M
B. 0.05 M
C. 0.10 M
D. 0.15 M (correct)
E. 0.30 M (I guessed this)</p>
<p>While I realize my answer was wrong, I’m confused over the thought process of this question. Can someone help?</p>