Calculate the K_sp for hydroxide if the solubility of Sr(OH)₂ in pure water is 1.42 × 10¹g/L. A) 1.16 × 10^-1 B) 6.40 × 10^-3 C) 1.42 × 10¹ D) 1.60 × 10^-3 E) 7.70 × 10^-11

Question

Quizplus · Accepted Answer

The molar mass of Sr(OH)₂ is approximately 121.63 g/mol. The solubility in mol/L is 1.42 × 10¹ g/L ÷ 121.63 g/mol = 0.1167 mol/L. Sr(OH)₂ dissociates into Sr²⁺ and 2 OH⁻, so [Sr²⁺] = 0.1167 M and [OH⁻] = 2 × 0.1167 M = 0.2334 M. Ksp = [Sr²⁺][OH⁻]² = (0.1167)(0.2334)² = 6.40 × 10⁻³.

Calculate the Ksp for Hydroxide If the Solubility of Sr(OH)2

Calculate the K_sp for Hydroxide If the Solubility of Sr(OH)₂