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Equilibrium and solubility (qualitative aspect)

Total questions: 15

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

What is the equilibrium expression for the solubility product (Ksp) of the following salt :


MgCO3

a)

Ksp = [Mg2+] [CO3-]

b)

Ksp = [Mg2+] [CO32-]

c)

Ksp = [Mg2+]2 [CO32-]

d)

Ksp = [Mg2+] [CO32-]2

2.

What is the equilibrium expression for the solubility product (Ksp) of the following salt :


Mg(OH)2

a)

Ksp = [Mg2+] [OH-]2

b)

Ksp = [Mg2+]2 [OH-]

c)

Ksp = [Mg+] [OH-]

d)

Ksp = [Mg+] [OH-]2

3.

What is the equilibrium expression for the solubility product (Ksp) of the following salt :


Al(OH)3

a)

Ksp = [Al+] [OH-]3

b)

Ksp = [Al2+] [OH-]3

c)

Ksp = [Al+]3 [OH3-]

d)

Ksp = [Al3+] [OH-]3

4.

What is the equilibrium expression for the solubility product (Ksp) of the following salt :


Fe2S3

a)

Ksp = [Fe2+]3 [S3-]2

b)

Ksp = [Fe+]2 [S-]3

c)

Ksp = [Fe3+]2 [S2-]3

d)

Ksp = [Fe2+] [S3-]

5.

What is the equilibrium expression for the solubility product (Ksp) of the following salt :


Ag2CO3

a)

Ksp = [Ag+]2 [CO32-]

b)

Ksp = [Ag+]3 [CO32-]2

c)

Ksp = [Ag3+]2 [CO2-]3

d)

Ksp = [Ag2+]3 [CO3-]2

6.

Which of the following equation represents the equilibrium equation of solubility of BaSO4 in water ?

a)

BaSO4(s) ↔ Ba2+(aq) + 2SO4-(aq)

b)

BaSO4(s) ↔ Ba+(aq) + 4SO-(aq)

c)

BaSO4(s) ↔ Ba+(aq) + SO4-(aq)

d)

BaSO4(s) ↔ Ba2+(aq) + SO42-(aq)

7.

Which of the following equation represents the equilibrium equation of solubility of PbCl2 in water ?

a)

PbCl2 (s) ↔ 2Pb+(aq) + Cl2-(aq)

b)

PbCl2 (s) ↔ Pb2+(aq) + 2Cl-(aq)

c)

PbCl2 (s) ↔ Pb+(aq) + Cl2-(aq)

d)

PbCl2 (s) ↔ Pb+(aq) + Cl-(aq)

8.

Which of the following equation represents the equilibrium equation of solubility of Cr(OH)3 in water ?

a)

Cr(OH)3(s) ↔ Cr3+(aq) + OH3-(aq)

b)

Cr(OH)3(s) ↔ Cr+(aq) + OH3-(aq)

c)

Cr(OH)3(s) ↔ Cr3+(aq) + 3OH-(aq)

d)

Cr(OH)3(s) ↔ 3Cr+(aq) + OH3-(aq)

9.

Which of the following equation represents the equilibrium equation of solubility of Ca3(PO4)2 in water ?

a)

Ca3(PO4)2(s) ↔ 2Ca3+(aq) + 3PO42-(aq)

b)

Ca3(PO4)2(s) ↔ 3Ca2+(aq) + 2PO43-(aq)

c)

Ca3(PO4)2(s) ↔ 3Ca+(aq) + 2PO4-(aq)

d)

Ca3(PO4)2(s) ↔ 2Ca2+(aq) + 3PO43-(aq)

10.

Which of the following equation represents the equilibrium equation of solubility of Li2CO3 in water ?

a)

Li2CO3(s) ↔ 2Li+(aq) + CO32-(aq)

b)

Li2CO3(s) ↔ Li2+(aq) + CO32-(aq)

c)

Li2CO3(s) ↔ Li+(aq) + CO3-(aq)

d)

Li2CO3(s) ↔ 2Li+(aq) + 3CO-(aq)

11.

Which of the following insoluble salt whose Ksp has a unit of :


mol2 dm-6


(you may choose more than one answer)

a)

Al2S3

b)

CaSO4

c)

PbS

d)

AlPO4

e)

AgBr

12.

Which of the following insoluble salt whose Ksp has a unit of :


mol3 dm-9


(you may choose more than one answer)

a)

Ag2S

b)

BaF2

c)

CaCO3

d)

Al(OH)3

e)

Li2CO3

13.

Which of the following insoluble salt whose Ksp has a unit of :


mol4 dm-12


(you may choose more than one answer)

a)

Ag2SO4

b)

Ca3(PO4)2

c)

Co(OH)3

d)

Mn(OH)2

e)

PbCO3

14.

Which of the following insoluble salt whose Ksp has a unit of :


mol5 dm-15


(you may choose more than one answer)

a)

Al(OH)3

b)

Ca3(PO4)2

c)

Li3PO4

d)

Sb2S3

e)

HgI2

15.

Which of the following statements ARE TRUE regarding solubility of the insoluble salt in water ?

a)

Ksp represents expression of equilibrium solubility of an insoluble salt at pure water at 298K

b)

Equilibrium of solubility of insoluble salt in water is one of an example of process of dynamic equilibrium

c)

The smaller the numerical value of Ksp for any insoluble salts which has the same number of ion produced in water, the greater their solubility in water

d)

Insoluble salt dissolving total number of both cation and anion equal to 4 has a Ksp unit of mol3 dm-9

e)

the numerical value of Ksp of PbCl2 is proportional to the square of the concentration of Pb2+ ion in solution