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8. (6 Pts) According to the solubility rules we learned last semester lead(II) chromate is insoluble,...

8. (6 Pts) According to the solubility rules we learned last semester lead(II) chromate is insoluble, yet the Ksp of lead(II) chromate 2.0×10-14. Explain this contradiction.

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Answer #1

Ksp - solubility product constant is the equilibrium constant of a solid salt dissociation into its ions in solution.

Ksp value interpret the extent of solubility of a salt in solution. Larger the Ksp value greater is the solubility of the salt.

Hence the Ksp value for lead chromate is very small that shows the salt is very less soluble in water ( practicaly insoluble in water) . It comes under slightly soluble ionic compounds.

Hence the Ksp value shows lead chromate is not insoluble but the solubility is exceedingly small in water.

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