Orthophosphorous acid () is titrated against . Based on its specific molecular structure, what is it — p Block Elements Chemistry Question

💡 Solution & Explanation

Orthophosphorous acid ($H_3PO_3$) contains exactly two ionizable P-OH bonds and one non-ionizable direct P-H bond. Therefore, it is a dibasic acid and requires exactly 2 moles of $NaOH$ to completely neutralize 1 mole of the acid.