In a Ksp problem, the solute involved is typically which phase?

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Multiple Choice

In a Ksp problem, the solute involved is typically which phase?

Explanation:
Ksp describes the dissolution of a solid into its ions in water. The equilibrium is between a pure solid phase and the ions that enter solution, so the solid is the solute in this context. The solid’s activity is taken as 1, and the Ksp expression involves only the concentrations of the dissolved ions in the aqueous phase. This is why, in Ksp problems, the solute involved is the solid, not the gas, liquid, or the dissolved ions themselves.

Ksp describes the dissolution of a solid into its ions in water. The equilibrium is between a pure solid phase and the ions that enter solution, so the solid is the solute in this context. The solid’s activity is taken as 1, and the Ksp expression involves only the concentrations of the dissolved ions in the aqueous phase. This is why, in Ksp problems, the solute involved is the solid, not the gas, liquid, or the dissolved ions themselves.

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