Orthophosphorous acid () is titrated against . Based on its specific molecular structure, how many m — p Block Elements Chemistry Question
Question
Orthophosphorous acid ($H_3PO_3$) is titrated against $NaOH$. Based on its specific molecular structure, how many moles of $NaOH$ are strictly required to completely neutralize one mole of $H_3PO_3$?
Answer: B
💡 Solution & Explanation
Orthophosphorous acid ($H_3PO_3$) is a dibasic acid. Its structure contains only two ionizable P-OH bonds (and one non-ionizable P-H bond). Therefore, exactly 2 moles of $NaOH$ are required to completely neutralize 1 mole of the acid.
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