Question

Salt that can be used in laboratory to prepare nitric acid is/are?

• A. $KN{O}_3$
• B. $NaN{O}_3$
• C. Both a) and b)
• D. $Hg(NO{)}_3$

Answer 1

The correct option is C

Both a) and b)

Both $KN{O}_3$ and $NaN{O}_3$ can be used to prepare nitric acid.

$NaN{O}_3+H_{2}O->HN{O}_3+NaOH$

$KN{O}_3+H_{2}O->HN{O}_3+KOH$

It can be viewed as an acid-base reaction, with the two conjugate acid-base pairs, $H_{2}O$ and $NaOH$ being one pair , $NaN{O}_3$ and $HN{O}_3$ being second pair.