A 22.0-g sample of HF is dissolved in water to give 2.0 × 102 mL of solution. The concentration of the solution is:
1.10 M
0.11 M
5.5 M
11.0 M
0.22 M

What volume of 18 M sulfuric acid must be used to prepare 1.90 L of 0.162 M H2SO4?
5.5 mL
1.5 × 103 mL
0.31 mL
3.2 mL
17 mL

The following reactions

2K(s) + Br2(l) → 2KBr(s)

AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)

HCl(aq) + KOH(aq) → H2O(l) + KCl(aq)

are examples of
redox reactions.
precipitation reactions.
precipitation (two) and acid-base reactions, respectively.
redox, precipitation, and acid-base, respectively.
None of these choices are correct.

Which pair of ions would not be expected to form a precipitate when dilute solutions of each are mixed?
Al3+, S2-
Mg2+, SO42-
Ba2+, PO43-
Pb2+, Cl-
Pb2+, OH-


In the balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid, the products are:
NaSO3 + 2H2O
NaSO4 + H2O
2NaSO4 + H2O
Na2S + 2H2O
Na2SO4 + 2H2O

The oxidation state of iodine in IO3- is:
-5
-3
+3
+5
0