Question

Concentration of the Ag⁺ ions in a saturated solution of Ag₂C₂O₄ is 2.24 × 10⁻⁴ mol L⁻¹ solubility product of Ag₂C₂O₄ is ____________.

Options

• 2.24 × 10⁻⁸ mol³ L⁻³

• 2.66 × 10⁻¹² mol³ L⁻³

• 4.5 × 10⁻¹¹ mol³ L⁻³

• 5.619 × 10⁻¹² mol³ L⁻³

Answer 1

Concentration of the Ag⁺ ions in a saturated solution of Ag₂C₂O₄ is 2.24 × 10⁻⁴ mol L⁻¹ solubility product of Ag₂C₂O₄ is 5.619 × 10⁻¹² mol³ L⁻³.

Explanation:

\[\ce{Ag2C2O4 ⇌ 2Ag^+ + C2O^{2-}_4}\]

[Ag⁺] = 2.24 × 10⁻⁴ mol L⁻¹

\[\ce{[C2O^{2-}_4]}\] = `(2.24 xx 10^-4)/2` mol L⁻¹

= 1.12 × 10⁻⁴ mol L⁻¹

K_sp = \[\ce{[Ag^+]^2 [C2O^{2-}_4]}\]

= (2.24 × 10⁻⁴ mol L⁻¹)² (1.12 × 10⁻⁴ mol L⁻¹)

= 5.619 × 10⁻¹² mol³ L⁻³