Classify $N a H_{2} P O_{2}$ and $N a H S O_{4}$ salts as acid salt or normal salt.

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Solution

An acid salt is a salt whose partial acidic hydrogen are replaced by metal cation. For example- in NaHSO_4 one of the acidic hydrogen is replaced by $N a^{+}$ , as shown in the figure. So, it is called acid salt.

$H_{2} S O_{4} + N a C l ⟶ N a H S O_{4} + H C l$

In case of $N a H_{2} P O_{2}$ the only acidic hydrogen (red hydrogen as shown in the figure) present in $H_{3} P O_{2}$ is replaced by Na metal. So, such salt is called neutral salt.

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