Which of the following mixtures does NOT exhibit a classic common ion effect on the degree of dissoc — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

The common ion effect refers to the suppression of the degree of dissociation of a weak electrolyte by the addition of a strong electrolyte containing a common ion. $HCN$, $NH_4OH$, and $CH_3COOH$ are weak electrolytes, so their mixtures with strong salts exhibit this effect. $NaCl$ and $HCl$ are both strong electrolytes that dissociate completely, so neither suppresses the 'degree of dissociation' of the other in the traditional sense.