Which of the following weak electrolytes would give aqueous solution having $3 C α$ anion concentration?

A_{3} B

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A_{3} B_{2}

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{A B}_{3}

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A_{3} B_{4}

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Solution

The correct option is A $A_{3} B$
$A B_{3} \to A^{+} + 3 B^{-}$
$t = 0$ , $C$ $0$ $0$

$t = t_{e q}$ , $C (1 - α)$ $C α$ $3 C α$

Hence the electrolyte $A_{3} B$ will give the desired anion concentration at equilibrium.

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