OFFICIAL Oct. 8, 2005 SAT II: Chemistry Forum

<p>good luck to you all.. Im just thankful that I wasn't the only one who thought the exam was hard. I mean, they curve the score percentage depending on national scores.. so if it was hard for all of us, some of us might be able to get the perfect score with a few more wrongs than 7,8.. which is the normal average # of wrong's you can get to get 800.</p>

<p>When do they post scores online?</p>

<p>24th i think</p>

<p>Don't really understand why it takes so long - it's only graded by a computer. I guess they have to figure out the curve for each test.</p>

<p>the curve is pre-determined at the beginng of each testing year. it is created based on the bank of questions they have compiled for the test that year and the relative difficulty of the questions.</p>

<p>the redox one was not combustion, oxygen changes oxidation state in combustion. (this was almost the same question as one of the questions I did on a practice.)</p>

<p>I chose neutrualization but I dont reli think its right either</p>

<p>it is not gonna be neutrualization I promise you. it may be single replacement thought. I don't remeber the question</p>

<p>hm, what was the question again?</p>

<p>something about redox. I decided I am not canceling my score.
my feeling is like gambling. try to chip in that every body did suck</p>

<p>Hm i think i might have put neutralization too. Why is it not neutralization?</p>

<p>there is not oxidation state change in the reaction. for instance. NaOH + HCl = NaCl + H2O.
Na is still +1, Cl is still -1, O -2, H +1
So no oxidation state changed</p>

<p>i got the 23 electrons for Fe 3+ right!!! That was like the only question i was sure on. for those of you who took it in june, which one was harder??</p>

<p>this is my first time and i messed up</p>

<p>my virginity, messed up by this freak test</p>

<p>bump......</p>

<p>well...if there is no oxidation change in any neutralization reactions, then neutralization reactions are NOT redox reactions, so that would be the right answer to that question</p>

<p>single replacement is definetly out, think about the zinc and HCl for H2 gas equation.</p>

<p>Well single replacement is a redox reaction. Zinc is a very strong reducer. And most strong acid are oxidizer</p>

<p>Think about this
here is an example
Na + HCl = NaCl +H2
Na changed from 0 to +1
and H change from -1 to 0.</p>

<p>remeber NOT ONLY the reaction involved oxygen can be redox reaction. all kinda reaction involve change in charge can be redox</p>

<p>hmm
i guess the answer neutralization then? unless someone can think of an example where that can turn into a redox?</p>