Equivalent weight of \( \mathrm{H}_{3} \mathrm{PO}_{4} \) in each of the reaction will be respec...

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Equivalent weight of \( \mathrm{H}_{3} \mathrm{PO}_{4} \) in each of the reaction will be respectively :
\[
\begin{array}{l}
\mathrm{H}_{3} \mathrm{PO}_{4}+\mathrm{OH}^{-} \rightarrow \mathrm{H}_{2} \mathrm{PO}_{4}^{-}+\mathrm{H}_{2} \mathrm{O} \\
\mathrm{H}_{3} \mathrm{PO}_{4}+2 \mathrm{OH}^{-} \rightarrow \mathrm{HPO}_{4}^{2-}+2 \mathrm{H}_{2} \mathrm{O} \\
\mathrm{H}_{3} \mathrm{PO}_{4}+3 \mathrm{OH} \rightarrow \mathrm{PO}_{4}^{3-}+3 \mathrm{H}_{2} \mathrm{O}
\end{array}
\]
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