<p>Haha, sorry, I meant H2O. Same thing. :)</p>
<p>you'd get 1 point gyros --> the 1 point for the H2O.</p>
<p>you'd lose the reactant point b/c you didn't have HC2H3O2</p>
<p>so the product points are individual? they're not all or nothing?</p>
<p>yea they're individual.
every product you miss, you lose a point.</p>
<p>say there were 3 products, if you missed 2 of them, you miss both product points.</p>
<p>Was anybody else suprised that there wasn't a kinetics problem or a ox/red-electrochem problem in the free response?</p>
<p>yeah I was definitely surprised. rate of rxns are sort of my forte. I certainly didn't mind that there was no electrochem besides like 1 or 2 MC, though.</p>
<p>ziggytheman, electrochemistry had been tested to death, as well as spectroscopy, which appeared on five straight exams. However, the MO theory has not been tested for a while.</p>
<p>yea i was, you didnt even have to do a single "I-C-E" table anywhere in the test...ridiculous but im not complaining</p>
<p>eh you had to on the first problem w/ Ksp didn't you?</p>
<p>to see equilibrium concentrations of Pb and I?</p>
<p>You didn't HAVE to set up the table, but it's essentially the same thing whether you set it up or not, right?</p>
<p>i guess so, but i usually dont set them up if they just have "x" in them, only if it's like x-1....or leads to a quadratic</p>
<p>yea yea you guys are technically right</p>
<p>I actually like electrochem. I think it's one of the easiest topics in AP chem. The only part I don't like is when they include eloctrolysis, like plating out of metal and such. Galvanic/voltaic cells are easy though.</p>
<p>yea i was so happy when i saw the questions in the MC about which would be the cathod/anode</p>
<p>i also find nuclear chem interesting, and thus it is easy for me (wish there would have been more than 1 ? about it on the MC)</p>
<p>Bah guys I Looked in Chemistry book and I found nothing about Ni(Oh)2 as being a complex. I am wondering though... I believe we would still get 1 point if we put Ni(oh)2 and if the answer was Ni(oh)4 2+.</p>
<p>no...the answer for the Nickel(II) hydroxide question is from an earlier exam..it was used b4 and the answer given was</p>
<p>Ni^2+ + OH^- >>>>> Ni(OH)4^2-</p>
<p>but i think as long as your charges match up, you should receive credit</p>
<p>What if i had NI(oh)2 and what exam were u looking at?</p>
<p>Careful. There was no mention of excess potassium hydroxide solution. Consequently, the reaction is not complex-ion; it is solubility.</p>
<p>Ni(2+) + (OH-) --> Ni(OH)2</p>
<p>the answer is what fabrizio said. Stop tormenting yourselves that is the asnwer dont overthink it.</p>
<p>well even if it was excess, wouldn't it still be the same answer?</p>
<hr>
<h2>On lab question #5, they ask you to write the formula for the precipitate. What if I wrote the whole reaction, including the precipitate? Do I not get any credit?</h2>
<p>I did that too :-</p>
<p>For 2:</p>
<p>I disagree with 2e, it might be that i didnt round at all until that final answer</p>
<p>2a= -283kj
2b= -86.6
2c= -257kj
2d=YES, negative G
2e= 1.28E45</p>