Question

Which is not an example of common ion effect?

• A. $NaCl + AgCl$
• B. $H_2S + HCl$
• C. $CH_3COOH + NaOH$
• D. $NH_4OH + NH_4Cl$

Answer 1

Answer: (C)

$CH_3COOH + NaOH$

Answer 2

Common ion effect is the suppression of degree of dissociation of a weak electrolyte in the presence of a strong electrolyte having common ion.
Among the given, $CH_3COOH + NaOH$ has no common ion, thus does not exhibit common ion effect