One gram of ${\mathrm{Na}}_3{\mathrm{AsO}}_4$ is boiled with excess of solid KI in presence of strong $\mathrm{HCl}$. The iodine evolved is absorbed in Kl solution and titrated against 0.2 N hypo solution. Assuming the reaction to be:

${\mathrm{AsO}}_4^{3-}+2{\mathrm{H}}^{+}+2{\mathrm{I}}^{-}⟶{\mathrm{AsO}}_3^{3-}+{\mathrm{H}}_2\mathrm{O}+{\mathrm{I}}_2$

Calculate the volume of hypo consumed. [Atomic weight of As = 75]