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Worksheets

Solubility

Total questions: 10

Worksheet time: 50mins

Name
Class
Date
1.

The Ksp expression for a saturated solution of Ca3(PO4)2 is

a)

Ksp = [Ca2+][PO43-]

b)

Ksp = [3Ca2+][2PO43-]

c)

Ksp = [Ca2+]3[PO43-]2

d)

Ksp = [3Ca2+]3[2PO43-]2

2.

What is the Ksp expression for an ionic compund of BaSO4

a)

Ksp= [Ba2+][SO42-]

b)

Ksp= [Ba2+][4SO42-]4

c)

Ksp= [Ba2+][4SO42-]

d)

Ksp= [2Ba2+][4SO42-]

3.

The molar solubility of silver sulphide is 5.0 x 10-17 mol/L. Calculate its solubility product.

a)

Ksp = 5 x 1049

b)

Ksp = 5 x 1033

c)

Ksp = 5 x 10-49

d)

Ksp = 5 x 10-33

4.

The solubility product of silver chromate (VI) at room temperature is 2.4 x 10-12. Calculate the molar solubility of Ag+(aq) and CrO42-(aq) ions in a saturated solution of silver chromate (VI) at room temperature.

a)

Ag+ = 1.68 x 104 M and CrO42- = 8.4 x 10-5 M

b)

Ag+ = 1.68 x 104 M and CrO42- = 8.4 x 105 M

c)

Ag+ = 1.68 x 10-4 M and CrO42- = 8.4 x 105 M

d)

Ag+ = 1.68 x 10-4 M and CrO42- = 8.4 x 10-5 M

5.

What will happen if some solid AgNO3 is added to a saturated solution of AgCl ?

a)

The AgNO3 will not dissolve

b)

More solid AgCl will dissolve

c)

More solid AgCl will produced

d)

There will be no effect on AgCl equilibrium

6.

The Ksp value for PbF2 is 4 x 10-8. Calculate the molar solubility of solid PbF2 in a 0.5M NaF solution.

a)

8 x 108

b)

1.6 x 107

c)

8 x 10-8

d)

1.6 x 10-7

7.

A person mixes 100.0 mL of 0.0015M CaCl2 and 50.0 mL of 0.0081M K2SO4. If the Ksp for CaSO4 is 2.4 x 10-5 , will a CaSO4 precipitate be observed?

a)

No precipitate occur

b)

Precipitate occur

8.

The solubility of CuI is 2 × 10–6 molar. What is the solubility product constant, Ksp, for CuI?

a)

1.4 × 10–3

b)

2 × 10–6

c)

4 × 10–12

d)

2 × 10–12

9.

Which of the following statements is held true about the common-ion effect on the equilibrium of solubility of salt ?

(you may choose more than one answer)

a)

Adding common-ion to the solution containing dissolved salt cause the solubility equilibrium shifts to the formation of undissolved salt

b)

Adding common-ion to the solution containing dissolved salt cause the numerical value of Ksp of corresponding salt changes

c)

Solubility of salt in solution containing common-ion is greater than that of pure water.

10.

Consider a beaker containing 100 ml of water, with solid AgCl on the bottom.


Which of the following statements is held true if NaCl is added to the solution?


(you may choose more than one answer)

a)

The amount of AgCl solid at the bottom of the beaker increases

b)

The amount of AgCl solid at the bottom of the beaker decreases

c)

The concentration of dissolved Ag+ ion in the solution stays the same

d)

The concentration of dissolved Ag+ ion in the solution changes