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 dilute each ion concentration by - equal volumes

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 low solubility

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 low solubility

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 both high solubilty

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 low solubility

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.