75 What is the normality of 0.3 M H3PO4, When it undergoes the reaction as: H3PO4+2OH- reacts to HPO32-+2H2O

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0.3 M H_{3} P O_{4}

H_{3} P O_{4} + 2 O H^{-} \to H P O_{3}^{2 -} + 2 H_{2} O

H_{3} P O_{4}

H_{3} P O_{4} + O H^{-} \to H_{2} P O_{4}^{-} + H_{2} O

H_{3} P O_{4} + 2 O H^{-} \to H P O_{4}^{2 -} + 2 H_{2} O

H_{3} P O_{4} + 3 O H^{-} \to P O_{4}^{3 -} + 3 H_{2} O

1

H_{3} P O_{4}

1

X (O H)_{2}

H_{3} P O_{4} + X (O H)_{2} \to X H P O_{4} + 2 H_{2} O

The equivalent weight of H3PO4 in following reaction

H3PO4 + Ca(OH)2 ---> CaHPO4 +2 H2O

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