For a reaction, $A_{x} B_{y} ⇌ x A^{y +} + y B^{x -}, K_{s p}$ is expressed as :

[A^{y +}]^{x} [B^{x -}]^{y}

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[A]^{y} [B]^{x}

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[A]^{x} [B]^{y}

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[A]^{x + y} [B]^{x - y}

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Solution

The correct option is B $[A^{y +}]^{x} [B^{x -}]^{y}$
From definition of $K_{s p}$ , it follows that for a reaction
$A_{x} B_{y} ⇌ x A^{y +} + y B^{x -}$ , $K_{s p}$ is expressed as:
$K_{s p} = [A^{y +}]^{x} [B^{x -}]^{y}$

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