SAT II Chem Problem...help

Test Preparation SAT Subject Test Preparation
1

<p>Hi,</p>

<p>I'm not sure if anyone looked at questions 5-9 on the REAL SAT II: Subject Tests book. It's basically a series of reactions and they are asking you to fill in the blanks. Can someone explain those to me? I don't really know what is going on. Sorry, I can't really post it here because it involves a diagram.</p>

<p>Thank you!</p>

2

<p>I'm assuming you have trouble with (7) and (8). (I got them wrong, too. :) ) (7) is (b) because you need H+ to reduce the Cr:O ratio. (8), well, you need OH- to increase that ratio. I'm not sure if I'm explaining this right. I asked my genius friend and this is what he told me.</p>

3

<p>so are they all redox reactions?</p>