<p>About the flame test...that's what I used as well. Na is yellow and Ca is orange in the flame.</p>
<p>Kenny, that's a certain solid 5 on any curve. Awesome job!</p>
<p>delta G was definately negative, something like -257000 J/ K mol. delta H was -283000 J/ mol or something, and delta S was like -83.3 J/mol.
1 and 2 were rediculously easy for me. On 4 I probably got 12/15 at the lowest. 5, 6, and 8 maybe 60-70% on each of them.</p>
<p>one of my numbers is wrong but im not sure which one. oh well, i got the answer right anyway...</p>
<p>i just ran out of time on both parts of the test--slow thinker</p>
<p>For the lab FRQ you could just dissolve the two compounds in water. Sodium carbonate is soluble, while calcium carbonate (aka chalk) is not.</p>
<p>What does KClO4 dissociate into?</p>
<p>K+ and ClO4-... please don't tell me that you took AP Chem</p>
<p>I thought it was not spontaneous, because one delta G formation was negative. Doesn't delta G alone have to be negative for spontaneity?</p>
<p>On the other hand, I looked at the reacion.
Reactants had 1.5 moles of gas, and products had 1 mole of gas.
So more ordered, so not spontaneous?</p>
<p>Did anyone put the same reason as me?</p>
<p>I'm pretty sure he meant what was the net ionic for that..i think it's </p>
<p>KClO4 --> K3ClO + O2</p>
<p><em>EDIT: </em>*, i forgot that chlorate was ClO3 NOT ClO4 GRRRRR</p>
<p>From bartelby:</p>
<p>When a chlorate is heated, oxygen is evolved, often explosively, and the chloride is formed; e.g., 2KClO3-->2KCl+3O2.</p>
<p>I had spontaneous, negative delta G</p>
<p>So I'm assuming everyone knew AgCl went to a ligand?</p>
<p>I did the #2 and #8, and came up with [Uuo] or [eka-Rn]8s1.</p>
<p>if i skipped 20 problems of multiple choice, but did the problems that i was sure i got right, would that be a problem in terms of getting a nice raw score. whats teh cut off for a 4 in terms of total points</p>
<p>did 2 & 7 on FR--hard to think though</p>
<p>If on #8 we put [ ]7s2 6d5 ... and still included 8s1, do we still get the points?</p>
<p>Guys can someone give me the calculations on how to calculate my score? What is the maximum amount of points. Like I know how much the FRQ is (55%) but out of how many points?</p>
<p>A Question: (nothing to do with the AP exam)
How do find the molarity of say, NA2CO3 solution? Would oxidatio nd reduction titration work..probly with KMnO4??</p>
<p>Also, as crystals form, wht substance is crystallizing?</p>
<p>bump my question</p>