An impure sample of `As_(2)O_(3)` weighitng `20 gm` was dissolved in water containing `10 gm`
Channel: Doubtnut
Date: 2020-01-26

An impure sample of `As_(2)O_(3)` weighitng `20 gm` was dissolved in water containing `10 gm` of `NaHCO_(3)` and the final solution was diluted to `400ml`.`20ml` of this solution was oxidised by `25ml` of a solution of `l_(2)`. Another solution of hypo containing `1.24 gm` of `Na_(2)S_(2)O_(3).5H_(2)O` in `40ml` was used to exactly reduce `25 ml` of same `l_(2)` solution (impurities inert) calculate `%` fo `AS_(2)O_(3)` in the sample (at. wt. of `As=75`)