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Cherish Conner
Chemistry
20 March, 19:26
Describe how to write the Ksp.
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Shaun
20 March, 19:29
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Well, for a start Ksp=Ksolubility product, and we use an equilibrium expression.
Explanation:
For the sparingly soluble salt, MX, we write the equation that represents its dissolution:
MX (s) H2O⇌M++X-
Ksp=[M+][X-][MX (s) ], but MX (s) as A SOLID cannot express a concentration, and thus the expression simplifies to ...
Ksp=[M+][X-]
Usually standard conditions are specified, because a hot solution can generally hold more solute than a cold one.
For salts of the form MX2, Ksp=[M2+][X-]2. Ksp
have been measured for a host of insoluble, and semi-soluble ionic salts.
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