SOLUBILITY: ANSWERS
1.) What is the difference between solubility and solubility product?
2.) Write the expression for the solubility product for Fe(OH)3. The equation for
the solubility equilibrium is Fe(OH)3 (s)  Fe3+ (aq) + 3 OH- (aq).
[Fe3+][OH-]
3.) At 25 degrees C, the concentration of Pb2+ ions in a saturated solution of PbF2
is 1.9 x 10-3 M. What is the value of Ksp for PbF2?
2.7x10-8
4.) What will the equilibrium concentrations of the dissolved ions in a saturated
solution of Mg(OH)2 at 25 degrees C? (Ksp= 8.9 x 10-12)
[OH-]=2.6x10-4 ; [Mg2+] = 1.3x10-4
5.) A solution is prepared by dissolving 1.5 x 10-3 mol of silver acetate
(AgC2H3O2) in 50 mL of hot water. Silver acetate dissolves according to the
equation AgC2H3O2(s)  Ag+ (aq_ + C2H3O2= (aq). Will a preciptate form if
the solution is cooled to 25 degrees C? Assume that a negligible change in
volume occurs during the operations. (Ksp= 2.3 x 10 -3)
No, Qsp= 9x10-4, Q<Ksp
SOLUBILITY:
1.) What is the difference between solubility and solubility product?
2.) Write the expression for the solubility product for Fe(OH)3. The equation for
the solubility equilibrium is Fe(OH)3 (s)  Fe3+ (aq) + 3 OH- (aq).
3.) At 25 degrees C, the concentration of Pb2+ ions in a saturated solution of PbF2
is 1.9 x 10-3 M. What is the value of Ksp for PbF2?
4.) What will the equilibrium concentrations of the dissolved ions in a saturated
solution of Mg(OH)2 at 25 degrees C? (Ksp= 8.9 x 10-12)
5.) A solution is prepared by dissolving 1.5 x 10-3 mol of silver acetate
(AgC2H3O2) in 50 mL of hot water. Silver acetate dissolves according to the
equation AgC2H3O2(s)  Ag+ (aq_ + C2H3O2= (aq). Will a preciptate form if
the solution is cooled to 25 degrees C? Assume that a negligible change in
volume occurs during the operations. (Ksp= 2.3 x 10 -3).