Calculate the number of conjugate acid-base pairs present in the aqeous solution of $H_{3} P O_{3}$ _______________

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answer is 3.

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Detailed Solution

$H_{3} P O_{3} + H_{2} O ⇌ H_{2} P O_{3}^{-} + H_{3} O^{+} H_{2} P O_{3}^{-} + H_{2} O ⇌ H P O_{3}^{- 2} + H_{3} O^{+} (H_{3} P O_{3}, H_{2} P O_{3}^{-}) \to (1) (H_{2} P O_{3}^{-}, H P O_{3}^{- 2}) \to (2) (H_{3} O^{+}, H_{2} O) \to (3)$

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