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Kohlrausch Law

NaH2PO2 and ...

Question

$N a H_{2} P O_{2}$ and $N a H P O_{3}$ are acid salts.

A

True

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B

False

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Solution

The correct option is B False
The given statement is False.
$N a H_{2} P O_{2}$ and $N a H P O_{3}$ are normal salts.
$N a H_{2} P O_{2}$ is a normal salt as all the ionisable H atoms of the parent acid have been replaced. Thus, when we replace 1 H atom from $H_{3} P O_{2}$ with 1 Na atoms, we get $N a H_{2} P O_{2}$ .
Note: $N a H_{2} P O_{2}$ has only one ionisable H atom.
$N a H P O_{3}$ is a normal salt as all the ionisable H atoms of the parent acid have been replaced. Thus, when we replace 1 H atom from $H_{2} P O_{3}$ with 1 Na atom, we get $N a H P O_{3}$ .
Note : $N a H P O_{3}$ has only one ionisable H atom.

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