Question

What is the best explanation for the fact that a solution of NaNO2(aq) is basic?NO2– is hydrolyzed with the formation of OH –(aq) ions.Na+ is hydrolyzed with the formation of OH –(aq) ions.NaNO2(aq) decreases the Ka of HNO2(aq).NaNO2(aq) increases the Ka of HNO2(aq).

Answer 1

Answer:

$NO_{2}^-$ is hydrolyzed with the formation of $OH^{-}_{(aq)}$ ions.

Explanation:

$NaNO_2$ is basic because it dissolves in water to form $NO_{2}^-$ ion which further hydrolyzed in water to give $OH^-$ ions.

The chemical reaction involving :

$NaNO_{2}\rightarrow Na^++NO_{2}^-$

$NO_2^-+H_2O\rightleftharpoons HNO_2+OH^-$

The hydroxide ions furnished in the above reaction is responsible for the $NaNO_2$ to be basic.