The Total solution for NCERT class 6-12
The ionization constant of nitrous acid is4.5 × 10–4. Calculate the pH of 0.04 M sodium nitritesolution and also its degree of hydrolysis.
NaNO2 is the salt of astrong base (NaOH) and a weak acid (HNO2).
Now, If x moles of the saltundergo hydrolysis, then the concentration of various species present in thesolution will be:
Therefore,degree of hydrolysis
=2.325 × 10–5