One gram of `Na_(3)AsO_(4)` is boiled with excess of solid `KI` in presence of strong `HCl`. The iodine evolved is absorbed in `KI` solution and titrated against `0.2 N` hyposolution. Assuming the reaction to be
`AsO_(4)^(3-)+2H^(+)+2I^(-) rarr AsO_(3)^(2-)+H_(2)O+I_(2)`,
calculate the volume of arsenate consumed. [Atomic weight of `As=75`]

Options

A. `48.1 ml`
B. `38.4ml`
C. `24.7ml`
D. `30.3ml`

Answer

A

Explanation

No. of equivalence of `Na_(2)AsO_(4) =`no. of equivalents of hypo
`(1)/(104) = (0.2 xx V)/(1000)`
`:.` Volume of hyp consumed `=48.07ml`