the dissociation of H2S is suppresed by the presence of HCl explain why - Chemistry - Equilibrium

Question

the dissociation of H2S is suppresed by the presence
of HCl explain why

Priya G N · Accepted Answer

The dissociation of H2S
is suppressed by the presence of HCl, due to common ion effect The
presence of H+ ion in HCl is a common ion to H2S

HCl ---> H+ + Cl-

H2S ---> 2H+ + S2-

Due to the suppressed degree of
dissociation of H2S, the concentration S2- ion is
produced low

The suppression of the degree of
ionisation of a weak electrolyte (weak acid or base) by addition of
some strong electrolyte having a common ion is called Common ion
effect