First slide

Ionic equilibrium

Question

Which is the set of amphiprotic species?

Moderate

A

$H_{3} O^{+}, {HPO}_{4}^{2 -}, {HCO}_{3}^{-}$
B

$H_{2} O, {HPO}_{3}^{2 -}, H_{2} {PO}_{2}^{-}$
C

${HSO}_{4}^{-}, H_{2} {PO}_{4}^{-}, H_{2} {PO}_{3}^{-}$
D

All of these

Solution

$In (a), H_{3} O^{+} is H^{+} ion donor only$
$In (b), {HPO}_{3}^{2 -}, H_{2} {PO}_{2}^{-} ions are H^{+} ion acceptor only.$

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