AP Chemistry Quiz: Solubility/Equations
Name
KEY
Date
Per
Score
/20
Part I. (1 point/item) Indicate whether the following compounds are soluble in water (S) or
insoluble in water (I):
Compound
Soluble/Insoluble
Compound
Soluble/Insoluble
1.
Cu(C2H3O2)2
S
6.
Al2(SO4)3
S
2.
PbS
I
7.
KMnO4
S
3.
CaO
I
8.
Na3PO4
S
4.
(NH4)2Cr2O7
S
9.
Fe(OH)3
I
5.
Hg2Cl2
I
10.
AgClO3
S
Part 2. (1 point/item) For each of the following reactions write a balanced equation.
Coefficients should be in terms of lowest whole numbers. Assume that solutions are aqueous
unless otherwise indicated. Represent substances in solutions as ions if the substances are
extensively ionized. Omit formulas for any ions or molecules that are unchanged by the
reaction. You may use the empty space at the bottom of the next page or additional paper for
scratch work, but only equations that are written directly below the original equations will
be graded. Assume all reactions go to completion.
NOTE: These equations are taken directly from Barron’s p 89-91, written in the new proper
format.
11. A saturated solution of Br2 in water is added to a solution containing potassium iodide.
Br2 + 2I- -> I2 + 2Br12. A piece of magnesium metal is placed in a solution of sulfuric acid.
Mg + 2H+ -> Mg2+ H2(g)
13. Sodium bromide solution is added to a silver perchlorate solution.
Ag+ + Br- -> AgBr
14. lron (III) nitrate solution is mixed with a potassium sulfite solution.
3Fe3+ + 2SO32- -> Fe3(SO3)2
15. Solid magnesium carbonate is reacted with hydrochloric acid.
MgCO3 + 2H+ -> Mg2+ + CO2 + H2O
16. Ammonium chloride solution is added to a barium hydroxide solution.
NH4+ + OH- -> NH3 + H2O
1
17. Chromium (III) chloride solution reacts with solid magnesium.
2Cr3+ + 3Mg -> 2Cr + 3Mg2+
18. Sodium carbonate solution is mixed with aluminum sulfate.
2Al3+ + 3CO32- -> Al2(CO3)3
19. Calcium hydroxide and sodium phosphate solutions are mixed.
3Ca2+ + 2PO43- -> Ca3(PO4)2
20. Carbon dioxide is bubbled into a solution of iron (III) nitrate.
2Fe3+ + 3CO2(g) + 3H2O -> Fe2(CO3)3 + 6H+
21. Solid lead (IV) oxide reacts with hydrochloric acid.
PbO2 + 4H+ -> Pb4+ + 2H2O
22. Ethyl alcohol is burned in excess oxygen.
C2H5OH + 3O2 -> 2CO2 + 3H2O
23. Hydrogen sulfide gas is bubbled into a solution containing cobalt (II) chloride
H2S (g) + Co2+
->
CoS + 2H+
24. Solid calcium oxide reacts with sulfuric acid.
CaO + 2H+ + SO42- -> H2O + CaSO4
25. Chlorine gas is bubbled into a solution of potassium iodide.
Cl2(g) + 2I- -> I2 + 2Cl-
2