Question

How do the concentrations of Ag+ and CrO42− in a saturated solution above 1.0 g of solid Ag2CrO4 change when 100 g of solid Ag2CrO4 is added to the system? Explain.

Answer 1

When 100 g of solid Ag₂CrO₄ is added to the system, the concentrations of Ag⁺ and CrO₄²⁻ in the saturated solution will not change.

Step-by-step explanation:

When 100 g of solid Ag₂CrO₄ is added to the system, the concentrations of Ag⁺ and CrO₄²⁻ in the saturated solution will not change.

This is because the addition of the solid does not affect the equilibrium between Ag⁺, CrO₄²⁻, and Ag₂CrO₄.

The concentration of Ag⁺ will still be twice the concentration of CrO₄²⁻, as dictated by the solubility constant expression for Ag₂CrO₄: [Ag⁺] = 2[S] and [CrO₄²⁻] = [S]. Therefore, the concentrations remain the same.