Hg2I2 (s) ⇄ Hg2 2 + (aq) + 2 I - (aq) Ksp = [Hg2 2+][I-]^2 A saturated solution of Hg2I2 is at equilibrium at 25°C as represented by the equation above. If [I-] = 4.6 * 10^-10 M at equilibrium, which of the following gives the correct molar solubility, S, and Ksp for Hg2I2?

Question

Theodore

Chemistry

15 April, 23:21

Hg2I2 (s) ⇄ Hg2 2 + (aq) + 2 I - (aq) Ksp = [Hg2 2+][I-]^2 A saturated solution of Hg2I2 is at equilibrium at 25°C as represented by the equation above. If [I-] = 4.6 * 10^-10 M at equilibrium, which of the following gives the correct molar solubility, S, and Ksp for Hg2I2?

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Dino · Answer 1

Hg₂I₂ ⇆ Hg₂⁺² + 2I⁻¹

2[I⁻¹ ] = 4.6 x 10⁻¹⁰

[I⁻¹ ] = 2.3 x 10⁻¹⁰ M

[Hg₂⁺²] = 2.3 x 10⁻¹⁰ M

Molar solubility = 2.3 x 10⁻¹⁰ moles / liter

Ksp = [Hg₂⁺²] x [2I⁻¹ ]²

= 4 x 2.3 x 10⁻¹⁰ x (2.3 x 10⁻¹⁰) ²

= 48.67 x 10⁻³⁰.