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`)

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 I_(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 I_(2) solution (impurities inert). Calculate % of AS_(2)O_(3) in the sample (at. wt. of As=75 )

12. g of an impure sample of arsenious oxide was dissolved in water containing 7.5 g of sodium bicarbonate and the resulting solution was diluted to 250 mL . 25 mL of this solution was completely oxidised by 22.4 mL of a solution of iodine. 25 mL of this iodine solution reacted with same volume of a solution containing 24.8 g of sodium thiosulphate (Na_(2)S_(2)O_(3).5H_(2)O) in one litre. Calculate teh percentage of arsenious oxide in the sample ( Atomic mass of As=74 )

12. g of an impure sample of arsenious oxide was dissolved in water containing 7.5 g of sodium bicarbonate and the resulting solution was diluted to 250 mL . 25 mL of this solution was completely oxidised by 22.4 mL of a solution of iodine. 25 mL of this iodine solution reacted with same volume of a solution containing 24.8 g of sodium thiosulphate (Na_(2)S_(2)O_(3).5H_(2)O) in one litre. Calculate teh percentage of arsenious oxide in the sample ( Atomic mass of As=57 )

A solution containing 1.984 g of crystalline NA_(2)SO_(2)O_(3).xH_(2)O in water required 40ml of N//5 lodine solution for complete reaction .Calculate the value of x

20 ml of 20 vol H_(2)O_(2) solution is diluted to 80 ml. The final volume strength of solution is

In a given sample of H_(2)O_(2) each 100 mL of solution contains 68 mg of H_(2)O_(2) . The molarity of the solution is