CHEMISTRY SCH4UUnit 4 Test
Name: Quinn Derksen
SCH4U: Chemistry, Grade 12, University Preparation
Unit 4: Chemical Systems and Equilibrium
Unit 4 Test
Part A: Multiple choice questions (1 mark each)
1. In the system A(g) + 2B(g) ⇌ 2C(g) + 2D(g) ΔH=21 kJ/mol, it is possible to
increase the quantity of C by:
a. adding a catalyst
b. decreasing the [B]
c. decreasing the pressure
d. increasing the temperature
2. 0.80 mol/L of A and B are mixed. They react very slowly to produce C
and D as follows:
A(aq) + B(aq) ⇌ C(aq) + 2D(aq)
When equilibrium is attained, the concentration of C is 0.60 mol/L and
the concentration of A is:
a. 0.20 M
b. 0.40 M
c. 0.60 M
d. 0.80 M
3. Consider the reaction 3X + Y ⇌ 2W + Z.
At equilibrium, [X] is 7.0 M, [Y] is 6.0 M, [W] is 5.0 M and [Z] is 7.0 M at
298 K. The value of the equilibrium constant at this temperature is:
a. 0.085
b. 0.560
c. 1.800
d. 11.760
4. A mixture of lead, magnesium, nitrate and chromate ions are
present in a solution. What will the precipitate be?
a. MgPb
b. Pb(NO3)
2 c. PbCrO4
d. MgCO3
, CHEMISTRY SCH4UUnit 4 Test
5. Acetic acid dissociates itself as follows:
CH3COOH(aq) ⟶ H+(aq) + CH3 -
(aq)
COO
If you add sodium acetate, CH3COONa, to the solution:
a. a precipitate will be formed
b. more acetic acid will be ionized
c. the concentration of hydrogen ions will decrease
d. the solution will become more acidic
6. Using the Ksp, what is the solubility of AgCl, in
mol/L? a. 1.3 x 10-5 mol/L
b. 3.4 x 10-7 mol/L
c. 1.7 x 10-10 mol/L
d. 2.4 x 10-10 mol/L
7. Which of the following pairs of compounds will give a precipitate
in a diluted solution?
a. Cu(NO3)2 and Na2CO3
b. KNO3 and NaCl
c. MgCl2 and Ba(NO3)2
d. NH4Cl and Al2(SO4)3
8. A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the
precipitate(s) be?
a. AgOH
b. AgI and AgBr
c. AgOH and AgBr
d. AgOH, AgI and AgBr
9. What is the maximum concentration of Ca2+ ions in a solution
containing 0.010 M of F- ions?
a. 8.5 x 10-9 M
b. 1.7 x 10-8 M
c. 3.9 x 10-7 M
d. 1.7 x 10-6 M
10.A solution of acetic acid 12 M is a:
a. concentrated, strong acid
b. dilute, strong acid
c. concentrated, weak acid
d. dilute, weak acid
Name: Quinn Derksen
SCH4U: Chemistry, Grade 12, University Preparation
Unit 4: Chemical Systems and Equilibrium
Unit 4 Test
Part A: Multiple choice questions (1 mark each)
1. In the system A(g) + 2B(g) ⇌ 2C(g) + 2D(g) ΔH=21 kJ/mol, it is possible to
increase the quantity of C by:
a. adding a catalyst
b. decreasing the [B]
c. decreasing the pressure
d. increasing the temperature
2. 0.80 mol/L of A and B are mixed. They react very slowly to produce C
and D as follows:
A(aq) + B(aq) ⇌ C(aq) + 2D(aq)
When equilibrium is attained, the concentration of C is 0.60 mol/L and
the concentration of A is:
a. 0.20 M
b. 0.40 M
c. 0.60 M
d. 0.80 M
3. Consider the reaction 3X + Y ⇌ 2W + Z.
At equilibrium, [X] is 7.0 M, [Y] is 6.0 M, [W] is 5.0 M and [Z] is 7.0 M at
298 K. The value of the equilibrium constant at this temperature is:
a. 0.085
b. 0.560
c. 1.800
d. 11.760
4. A mixture of lead, magnesium, nitrate and chromate ions are
present in a solution. What will the precipitate be?
a. MgPb
b. Pb(NO3)
2 c. PbCrO4
d. MgCO3
, CHEMISTRY SCH4UUnit 4 Test
5. Acetic acid dissociates itself as follows:
CH3COOH(aq) ⟶ H+(aq) + CH3 -
(aq)
COO
If you add sodium acetate, CH3COONa, to the solution:
a. a precipitate will be formed
b. more acetic acid will be ionized
c. the concentration of hydrogen ions will decrease
d. the solution will become more acidic
6. Using the Ksp, what is the solubility of AgCl, in
mol/L? a. 1.3 x 10-5 mol/L
b. 3.4 x 10-7 mol/L
c. 1.7 x 10-10 mol/L
d. 2.4 x 10-10 mol/L
7. Which of the following pairs of compounds will give a precipitate
in a diluted solution?
a. Cu(NO3)2 and Na2CO3
b. KNO3 and NaCl
c. MgCl2 and Ba(NO3)2
d. NH4Cl and Al2(SO4)3
8. A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the
precipitate(s) be?
a. AgOH
b. AgI and AgBr
c. AgOH and AgBr
d. AgOH, AgI and AgBr
9. What is the maximum concentration of Ca2+ ions in a solution
containing 0.010 M of F- ions?
a. 8.5 x 10-9 M
b. 1.7 x 10-8 M
c. 3.9 x 10-7 M
d. 1.7 x 10-6 M
10.A solution of acetic acid 12 M is a:
a. concentrated, strong acid
b. dilute, strong acid
c. concentrated, weak acid
d. dilute, weak acid
