The solution of sodium carbonate has $pH$

An aqueous solution of sodium carbonate is alkaline because sodium carbonate is a salt of

Aqueous solutions of $1 \ M$ potassium acetate and $1 \ M$ potassium formate are taken in separate beakers. Which of the following relationships is correct?

How many hydroxide ions are produced by the hydrolysis of one mole of sodium carbonate $(Na_2CO_3)$?

Which of the following salts does not undergo hydrolysis in water?

Calculate the hydrolysis constant $(K_h)$ for a salt containing $NO_2^-$. Given that the dissociation constant $(K_a)$ for $HNO_2$ is $4.5 \times 10^{-4}$ and the ionic product of water $(K_w)$ is $1.0 \times 10^{-14}$.