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

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

Step-by-step 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.