Solubility of $AgCl$ in conc. $HCl$ is ...... than in water.

Write about the common ion effect.

Calculate the degree of ionization of $0.05 \ M$ acetic acid if its $p K_{ a }$ value is $4.74$. How is the degree of dissociation affected when its solution also contains $(a)$ $0.01 \ M$ $HCl$ and $(b)$ $0.1 \ M$ $HCl$?

Define the common ion effect and explain it with an example.

$A$ saturated solution of $BaSO_4$ at $25^\circ C$ is $4 \times 10^{-5} \ M$. The solubility of $BaSO_4$ in $0.1 \ M \ Na_2SO_4$ at this temperature will be:

When $H_2S$ gas is passed into a certain solution,it reacts to form a white precipitate. The solution referred to contains ions of