Calculate the minimum concentration of Ag⁺ ion that must be added to (or built up in)a 0.140 M Na₂CrO₄ solution, in order to initiate a precipitation of silver chromate. The K_sp of Ag₂CrO₄ is 1.2 × 10^-¹².Hint: Use an ICE table to help organize your given information and remember to account for the presence of a common ion.

Question

Quizplus · Accepted Answer

To find the minimum concentration of Ag⁺ needed to start precipitation, use the Ksp expression: Ksp = [Ag⁺]²[CrO₄²⁻]. Given Ksp = 1.2 × 10⁻¹² and [CrO₄²⁻] = 0.140 M, solve for [Ag⁺]: [Ag⁺] = √(Ksp / [CrO₄²⁻]) = √(1.2 × 10⁻¹² / 0.140) = 2.9 × 10⁻⁶ mol L⁻¹.

Calculate the Minimum Concentration of Ag+ Ion That Must Be

Calculate the Minimum Concentration of Ag⁺ Ion That Must Be