Which of the following pairs correctly represent a conjugate acid-base pair? — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

A conjugate acid-base pair differs by exactly one proton ($H^+$). $H_3O^+$ loses $H^+$ to become $H_2O$. $H_2SO_4$ loses $H^+$ to become $HSO_4^-$. $H_2O$ loses $H^+$ to become $OH^-$. However, $NH_4^+$ and $NH_2^-$ differ by two protons, so they do not form a conjugate pair.