Molar solubility

Started by Corky Cacas
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Corky Cacas

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Hey, i have a problem with problem #74 Gchme in destroyer. i don't understand their solution and what they mean my molar solubility. can anyone help?
 
Like the solution says, Ksp(solubility product constant) only changes with temperature. Molar solubility is decreasing because the PbI2 solution is already saturated. Meaning there's already I- in solution. If you add more I-, the solubility won't be as great since there's already I- in solution.