ExamView - Practice Test 3B.tst

Chemistry 102
Practice Test 3B
Multiple Choice
1. What is the molar solubility of Cr(OH)3 in a saturated solution? (Ksp = 6.7 x 10–31)
A)
B)
C)
D)
1.7 x 10–8 M
1.3 x 10–8 M
3.9 x 10–8 M
8.2 x 10–16 M
2. When a weak acid is titrated with a weak base, the pH at the equivalence point
A)
B)
C)
D)
is greater than 7.0
is less than 7.0
is equal to 7.0
is determined by the size of Ka and Kb
3. A 25.0-mL sample of 1.00 M NH3 is titrated with 0.15 M HCl. What is the pH of the solution after addition
of 15.0 mL of HCl? (Kb for NH3 = 1.8 x 10–5)
A)
B)
C)
D)
10.26
9.21
8.25
9.30
4. A change in pH affects the solubility of which of the following compounds?
A)
B)
C)
D)
CuCl
AgI
BaF2
None of the above
5. What volume of 0.500M H2SO4 must be added to 20.0 mL of 0.400M LiOH to reach the equivalence point?
A) 8.00 mL
B) 4.00 mL
C) 16.0 mL
D) 32.0 mL
6. Which of the following statements is correct if 0.015 mol of KOH is added to 1.00L of 0.0010 M Ca(NO 3)2?
(Ksp for Ca(OH)2 = 6.5x10–6)
A)
B)
C)
D)
Calcium hydroxide precipitates until solution is saturated.
The solution is unsaturated and no precipitate forms.
The concentration of calcium ions is reduced by the concentration of the hydroxide ions.
Ksp for calcium nitrate must be known to make any meaningful predictions.
1
7. Which solution will cause the greatest change in the solubility of PbCl 2 at 25 °C?
A)
B)
C)
D)
0.1 M KNO3
0.1 M CaCl2
0.1 M NaCl
0.1 M HCl
8. Which of the following diagrams best represents the titration curve for titration of a strong base by a strong
acid?
A)
B)
C)
D)
A
B
C
D
9. What is the solubility of PbI 2 in 0.025M KI solution? (Ksp = 7.9 x10 –9)
A) 4.5 x10–2 M
B) 1.3 x10–5 M
C) 2.8 x10–2 M
D) 8.9 x10–5 M
10. The solubility of aluminum hydroxide ___________ when dilute nitric acid is added to it.
A) decreases
B) increases
C) does not change
D) cannot be predicted based on information given
11. Which of the following substances has the greatest solubility in water?
A)
B)
C)
D)
MgCO3 , Ksp = 3.5 x 10–8
AgIO3 , Ksp = 3.1 x 10–8
NiCO3 , Ksp = 1.3 x 10–7
CuBr , Ksp = 5.0 x 10–9
12. The concentration of the complex ion in each of the following solutions is 1.00 M. In which of the solutions
will the concentration of the metal ion be the greatest?
A)
B)
C)
D)
CdI42– , Kf = 1.0 x 106
Cu(NH3)42+ , Kf = 5.6 x 1011
Zn(OH)42– , Kf = 3.0 x 1015
Be(OH)42– , Kf = 4.0 x 1018
2
13. What is the maximum amount of sodium sulfate that can be added to 1.00 L of 0.0020 M Ca(NO 3)2 before
precipitation of calcium sulfate begins? (Ksp = 2.4 x 10 –5 for CaSO4)
A)
B)
C)
D)
4.8 x 10–8 mol
3.5 x 10–5 mol
4.9 x 10–3 mol
1.2 x 10–2 mol
3

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