Chemistry - Redox Reactions Question with Solution | TestHub

${\mathrm{H}}_3{\mathrm{PO}}_3+2\mathrm{NaOH}\to {\mathrm{Na}}_2{\mathrm{HPO}}_3+2{\mathrm{H}}_2\mathrm{O}$

$\begin{array}{ll}50 \mathrm{ml}& 1 \mathrm{M}\end{array}$

$1 \mathrm{M} \mathrm{V}=?$

$\Rightarrow \frac{{\mathrm{n}}_{\mathrm{NaoH}}}{{\mathrm{n}}_{{\mathrm{H}}_3{\mathrm{PO}}_3}}=\frac{2}{1}$

$\Rightarrow \frac{1\times \mathrm{V}}{50\times 1}=\frac{2}{1}\Rightarrow {\mathrm{V}}_{\mathrm{NaOH}}=100 \mathrm{ml}$

${\mathrm{H}}_3{\mathrm{PO}}_2+\mathrm{NaOH}\to {\mathrm{NaH}}_2{\mathrm{PO}}_3+{\mathrm{H}}_2\mathrm{O}$

$2\mathrm{M} 1 \mathrm{M}$

$100 \mathrm{mL} \mathrm{V}=?$

$\Rightarrow \frac{{\mathrm{n}}_{\mathrm{NaoH}}}{{\mathrm{n}}_{{\mathrm{H}}_3{\mathrm{PO}}_3}}=\frac{1}{1}\Rightarrow \frac{1\times \mathrm{V}}{2\times 100}=\frac{1}{1}\Rightarrow {\mathrm{V}}_{\mathrm{NaOH}}=200 \mathrm{ml}$