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#solubility product

23 public questions tagged with this topic.

The Ksp of Ag₂CO₃ is 8.1 × 10⁻¹² . What is [Ag+] in a saturated solution with 0.01 M Na₂CO₃ ?

For Ag₂CO₃ 2Ag+ + CO₃²⁻ , Ksp = [Ag+]²[CO₃²⁻] = 8.1 × 10⁻¹² , [CO₃²⁻] ≈ 0.01 , [Ag+]² = (8.1 × 10⁻¹²/0.01) = 8.1 × 10⁻¹⁰ , [Ag+] = 2.85 × 10⁻⁵ M .

Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Relationship Between Kp Kc and Factors Affecting Equilibrium - Le Chatelier

The Ksp of AgIO₃ is 3.0 × 10⁻⁸ . What is [Ag+] in a saturated solution containing 0.02 M KIO₃ ?

For AgIO₃ Ag+ + IO₃- , Ksp = [Ag+][IO₃-] = 3.0 × 10⁻⁸ . [IO₃-] = 0.02 + [Ag+] ≈ 0.02 M , [Ag+] = (3.0 × 10⁻⁸/0.02) = 1.5 × 10⁻⁶ M .

Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Homogeneous and Heterogeneous Equilibria and Applications of Equilibrium Constant

The Ksp of Al(OH)3 is 1.3 × 10⁻³³ . What is the minimum pH required to prevent precipitation of Al(OH)3 when [Al³⁺] = 0.

For Al(OH)3 Al³⁺ + 3OH- , Ksp = [Al³⁺][OH-]³ = 1.3 × 10⁻³³ . Given [Al³⁺] = 0.01 , 0.01 [OH-]³ = 1.3 × 10⁻³³ , [OH-]³ = 1.3 × 10⁻³¹ , [OH-] = (1.3 × 10⁻³¹)¹/³ ≈ 5.07 × 10⁻¹¹ . pOH = -log(5.07 × 10⁻¹¹) ≈ 10.3 , pH = 14 - 10.3 = 3.7 .

Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Homogeneous and Heterogeneous Equilibria and Applications of Equilibrium Constant

The Ksp of Fe(OH)3 is 4.0 × 10⁻³⁸ . What is the pH at which [Fe³⁺] = 1.0 × 10⁻¹⁰ M in a saturated solution?

For Fe(OH)3 Fe³⁺ + 3OH- , Ksp = [Fe³⁺][OH-]³ = 4.0 × 10⁻³⁸ . Given [Fe³⁺] = 1.0 × 10⁻¹⁰ , (1.0 × 10⁻¹⁰)[OH-]³ = 4.0 × 10⁻³⁸ , [OH-]³ = 4.0 × 10⁻²⁸ , [OH-] = (4.0 × 10⁻²⁸)¹/³ ≈ 1.59 × 10⁻⁹ . pOH = -log(1.59 × 10⁻⁹) ≈ 8.8 , pH = 14 - 8.8 = 5.2 .

Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Buffer Solutions and Solubility Product and Common Ion Effect