An alkali (weak base) is titrated against a strong acid with methyl orange as the indicator. Which o — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

Methyl orange is an indicator that transitions from red (in highly acidic solutions) to yellow (in less acidic/neutral solutions). When titrating a weak base with a strong acid, the solution transitions from an alkaline state to an acidic state. Thus, as the strong acid is added, the indicator changes from its basic colour (yellow) to its acidic colour (pinkish red) exactly at the endpoint.