Solubility Quiz #5 Trial Ksp
1. In an experiment, a student mixes equal volumes of 0.0020 M Pb2+ ions with 0.0040 M I- ions. The trial ion product is
A. 4.0 x 10-9
B. 3.2 x 10-8
C. 1.3 x 10-7
D. 8.0 x 10-6
2. In an experiment, 20.0 ml of 0.0060 M CaCl2 and 20.0 mL of 0.0050 M NaSO4 are mixed together.
The trial ion product (trial Ksp) is
A. 7.5 x 10-6 and a precipitate will form
B. 7.5
x 10-6 and a precipitate will not form
C. 3.0 x 10-5 and a precipitate will form
D. 3.0 x 10-5 and a precipitate will not form
3. In a saturated solution of Zn(OH)2, the [Zn2+] is
A. less than 0.10 M
B. more than 10.0 M
C. more than 0.10 M but less than 1.0 M
D. more than 1.0M but less than 10.0 M
4. When 0.20 M Al2(SO4)3 is added to an equal volume of 0.20 M CaCl2,
A. AlCl3 precipitates
B. CaSO4 precipitates
C. AlCl3 and CaSO4 precipitate
D. no precipitate forms
5. When a student mixes equal volumes of 0.20 M Na2S and 0.02 M Sr(OH)2.
A. no precipitate forms
B. a precipitate of only SrS forms
C. a precipitate of only NaOH forms
D. precipitates of both NaOH and SrS form
6. When solutions of Pb(NO3)2 and NaCl are mixed, the trial ion product (Trial Ksp)
is 9.8 x 10-6. Which of the following statements is true?
A. A precipitate forms because Ksp > 9.8 x 10-6
B.
A precipitate forms because Ksp
< 9.8 x 10-6
C. A precipitate does not form because Ksp < 9.8 x 10-6
D. A
precipitate does not form because Ksp > 9.8 x 10-6
7. When equal volumes of 0.060 M AgNO3 and 0.00090 M NaBrO3 are mixed, the trial ion product (TIP) is
A. less than Ksp and a precipitate forms
B. greater than Ksp and a precipitate forms
C. less
than Ksp and no precipitate forms
D. greater than Ksp and no precipitate forms
8. The mixture that could produce a precipitate of two compounds is
A. 0.2 M HgSO4 and 0.2 M FeCl2
B. 0.2 M AgNO3 and 0.2 MgCl2
C. 0.2 M K2CO3 and 0.2 CuSO4
D. 0.2
M ZnSO4 and 0.2 Ba(OH)2
9. Which of the following has a solubility of less than 0.10 M?
A. SrS
B. SrCl2
C. SrSO4
D. Sr(OH)2
10. When equal volumes of 2.0 M Pb(NO3)2 and 2.0 M KCl are mixed
A. a precipitate forms because trial ion product < Ksp
B.
a precipitate forms because trial
ion product > Ksp
C. a precipitate does not form because trial ion product < Ksp
D. a precipitate does not form because trial ion product > Ksp
11. A solution is found to have an initial [Pb2+] of 0.0066 M and a [Br-] of
0.00050 M. What will be observed as the ions interact?
Observation Reason
A. precipitate Trial Ksp > Ksp
B. precipitate Trial Ksp < Ksp
C. no precipitate Trial Ksp > Ksp
D. no precipitate Trial Ksp < Ksp
12. A solution is found to have an initial [Pb2+] of 0.066 M and a [Br-] of
0.050 M. What will be observed as the ions interact?
Observation Reason
A. precipitate Trial Ksp > Ksp
B. precipitate Trial Ksp < Ksp
C. no precipitate Trial Ksp > Ksp
D. no precipitate Trial Ksp < Ksp
13. A solution is found to have an initial [Pb2+] of 0.00264 M and a [Br-] of
0.050 M. What will be observed as the ions interact?
Observation Reason
A. precipitate Trial Ksp > Ksp
B. precipitate Trial Ksp = Ksp
C. no precipitate Trial Ksp > Ksp
D. no precipitate Trial Ksp = Ksp
14. What happens when equal volumes of 0.40 M BaCl2 and 0.40 M Pb(NO3)2 are mixed?
A. Only PbCl2 precipitates.
B. Only Ba(NO3)2 precipitates.
C. Both PbCl2 and Ba(NO3)2 precipitate.
D. No precipitate forms.
15. Which of the ions below could be used in a precipitation reaction to determine the [SO42-] in a water sample?
A. H+
B. Cs+
C. Sr2+
D. NH4+
16. Two salt solutions were mixed and a Trial Ksp was calculated to be
4.4 x 10-12. The Ksp value is 5.6 x 10-13. From this information, which of the following is a true statement?
Ksp comparison Outcome
A. Trial Ksp < Ksp precipitate forms
B. Trial Ksp > Ksp precipitate forms
C. Trial Ksp < Ksp no precipitate forms
D. Trial Ksp > Ksp no precipitate forms
17. Two salt solutions were mixed and a Trial Ksp was calculated to be
8.4 x 10-14. The Ksp value is 5.6 x 10-13. From this information, which of the following is a true statement?
Ksp comparison Outcome
A. Trial Ksp < Ksp precipitate forms
B. Trial Ksp > Ksp precipitate forms
C. Trial Ksp < Ksp no precipitate forms
D. Trial Ksp > Ksp no precipitate forms
18. When equal volumes of 0.40 M NaOH and 0.40 M CaS are mixed together,
A. a precipitate forms and the Trial Ksp would be less than Ksp.
B. no precipitate forms and the Trial Ksp would be less than Ksp.
C. a precipitate forms and the Trial Ksp would be greater than Ksp.
D. no precipitate forms and the Trial Ksp would be greater than Ksp.
19. When equal volumes of 0.00020 M NaOH and 0.00020 M MgS are mixed together,
A. a precipitate forms and the Trial Ksp is less than Ksp.
B. no precipitate forms and the Trial Ksp is less than Ksp.
C. a precipitate forms and the Trial Ksp is greater than Ksp.
D. no precipitate forms and the Trial Ksp is greater than Ksp.
20. When equal volumes of 0.00040 M NaOH and 0.00040 M MgS are mixed together,
A. a precipitate forms and the Trial Ksp is less than Ksp.
B. no precipitate forms and the Trial Ksp is less than Ksp.
C. a precipitate forms and the Trial Ksp is greater than Ksp.
D. no precipitate forms and the Trial Ksp is greater than Ksp.