Write the solubility product constant expression for the following salt: CoS(s). A)[Co²⁺]²[S^2-]² B)[Co²⁺]²[S^2-] C)[Co²⁺][S^2-] D)[Co²⁺][S^2-]² E)[Co²⁺]^1/2[S^2-]

Question

Quizplus · Accepted Answer

The solubility product constant expression for CoS is written as [Co2+][S2-]. However, since CoS is a solid, we do not include it in the Ksp expression. Therefore, the expression only contains the concentration of the ions in solution, which are Co2+ and S2-. The correct expression for the Ksp of CoS is then [Co2+][S2-]. Option C represents that expression.

Write the Solubility Product Constant Expression for the Following Salt