Write the solubility product expression for a sparingly soluble salt BaSO4
what is the formula for it

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Solution

SOLUBILITY:
It is a measure of extent to which a compound will dissolve in a given solvent at constant temperature.
SOLUBILITY PRODUCT:
The equilbrium between a solid ionic salt and its saturated aqueous solution is described by the solubility product expression.
BaSO4 is a slightly soluble salt. When a reasonable quantity of solid BaSO4 is mixed with water, only a very small amount will dissolve to produce Ba⁺² (aq) and SO₄^–2(aq).
BaSO₄(s) <=> Ba⁺²(aq) + SO₄^–2(aq)).
Then the solubility product expression is,
Ksp= [Ba2+(aq)][SO4^-2 (aq)]

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