Chemistry SAT II Problems! Please help!!!

Test Preparation
1

<li><p>How do we know that Si and O bond in SiO2?</p></li>
<li><p>A 0.1 molar solution of which has the lowest hydrogen ion concentration?</p></li>
</ol>

<p>HCl
AlCl3
NaHCO3
HC2H3O2</p>

<li><p>How do we compare the boiling points of different elements (not in compounds)?</p></li>
<li><p>Which charges of transition metals should we just know (chromium, magnesium, iron, copper, silver, zinc, etc.)?</p></li>
<li><p>In a reaction between CaCO4 and HCl, how do we know that CaCl2 results?</p></li>
<li><p>What volume of .4 M Ba(OH)2 (aq) is needed to neutralize 100 mL of .2 M HBr(aq)?</p>

<p>(A) 25 mL
(B) 50 mL
(C) 100 mL
(D) 200 mL
(E) 400 mL</p></li>
<li><p>The reaction of zinc metal, Zn, and HCl produces which?</p>

<p>H2 (g)
Cl2 (g)
Zn2+ (aq)</p>

<p>(A) II only
(B) III only
(C) I and II
(D) I and III
(E) All</p></li>
<li><p>A student added .1 mol of NaBr and .2 mol of BaBr2 to 2 liters of water to create an aqueous solution. What is the minimum number of moles of Ag(C2H3O2) the student must add to precipitate out all Br - ions as AgBr?</p></li>
</ol>

2

<p>No one knows at all?</p>

3

<p>Q7 is 1 and 3
is it CaCO4 or CaCO3-the answer is that carbonates and bicarbonates react with dil acids to form CO2 H2O and the salt.
Q6-25 ml. you have to neutralize 0.02 moles of H+. you get .8 moles of OH- from 1litre of Ba(OH)2. aM1V1=bM2V2 is the formula.
transition metals learn 21-30 at no.s for sure
Q2 is NaHCO3 i think as it seems to be the most basic, so highest pH so lowest H+ concentration.
for the boiling pts. it may be fractional distillation but i'm not sure
hope this helps</p>