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Question
Answer the following :
Explain the relation between ionic product and solubility product to predict whether a precipitate will form when two solutions are mixed?
Solution
Condition of precipitation:
The ionic product (IP) of an electrolyte is defined in the same way as solubility product (Ksp). The only difference is that the ionic product expression contains a concentration of ions under any condition whereas the expression of Ksp contains only equilibrium concentrations. If,
- IP = Ksp; the solution is saturated and solubility equilibrium exists.
- IP > Ksp; the solution is supersaturated and hence precipitation of the compound will occur.
- If IP < Ksp, the solution is unsaturated and precipitation will not occur.
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