<p>I’m pretty sure the balancing one was 2- if you balanced in terms of charge you realized that there was one Ca+2 on the products, and one HCO3- on the products. The reactants overall charge was 0, so there had to be 2 HC03-s.</p>
<p>Does anybody remember the T,T,CE type question about CO2- if you do, please post what it was! I can’t remember whether or not that one included something about acid rain.</p>
<p>yes i guessed 2 lol</p>
<p>no the answer to that question was TT</p>
<p>Do you remember what the question was specifically (I can’t remember the content of the question or my answer–but if I saw the content I would surely remember what I had put down) ?</p>
<p>I thought it was about global warming… and the second half was… hmm can’t remember haha</p>
<p>Co2 is part of the green house effect because co2 and water make acid.
It’s TT</p>
<p>YES! That reminds me of the day in AP Enviro Sci when my teacher preached about how global warming is a hype and we can’t be certain that humans cause the increased atmospheric temperatures. I gleefully filled in true on that one.</p>
<p>I’m panicking because I don’t recognize the questions that everyone’s talking about. Does anyone remember the first section of questions? I remember being asked about filtration, chromatography, etc. and having to match them up with its descriptions (i.e. used for substances w/ differences in boiling points, etc.)</p>
<p>was there a really easy question that asked the OH conc is 1<em>10^-3 what is the H conc and it was 1</em>10^-11. just seemed too easy for me</p>
<p>yes it was 1*10-11</p>
<p>only on college confidential… 29 pages already… damn guys…</p>
<p>umm… for the CO2 one, i put TF because the second part said “CO2 and water react to form acid rain” and i always remembered acid rain as involving sulfur. can anyone correct me please?</p>
<p>also, how do you find out if solutions are acidic? this might be embarrassingly wrong, but i put paper chromatography cuz i thought that includes litmus paper. someone correct me please!</p>
<p>i was looking for a 750 and i think my raw score is around 79 or 80 =]</p>
<p>btw math 2 was ridiculously easy… i got 1 wrong i think</p>
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<p>I think it said “water and CO2 react to form an acidic solution,” which is true. The second part I can’t remember.</p>
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<p>Indicators, which turn a certain color in a certain pH range. Chromatography is used to separate substances in a mixture (e.g. mixture of ink). Litmus paper is totally separate.</p>
<p>^jamesford, just for kicks what do you think the curve will be?</p>
<p>One of the answers was chromatography, though, for separating the dyes in an ink…I think that it was #2 or 3. As for the Fe(NO3)2, there are three moles of dissolved substances: 1 mole Fe2+ and 2 moles NO3-. THe NO3 doesn’t dissociate, but each NO3 ion does. I put 5 because for some reason I thought that the question said Fe3(NO3)2</p>
<p>The answer is 5…I forgot the formula though…</p>
<p>I don’t remember this Fe(NO3) question AT ALL! Are there any other tricky questions anybody can think of?</p>
<p>How many CEs were there?</p>
<p>acid rain was combustion?</p>
<p>whats allothropic?</p>
<p>acid rain was combustion? i didnt remember a combustion queston</p>
<p>Acid rain was neutralization</p>
<p>^oh yeah now i remember the question</p>
<p>acid rain and limestone is neutralization because limestone is cac03 which is a basic salt</p>
<p>Does anybody remember getting an answer that was .0005 M-- I believe it was choice E</p>