50 ml solution of H_(2)O_(2) was treated with excess KI (s) and the solution was acidified with acetic acid. The liberated I_(2) required 40 ml of 0.5 M Na_(2)S_(2)O_(3) solution for the end point using starch is indicator. Find the molairty and volume strength of the H_(2)O_(2) solution.

50 ml solution of H_(2)O_(2) was treated with excess KI (s) and the so

1.	50 ml solution of H_(2)O_(2) was treated with excess KI (s) and the solution was acidified with acetic acid. The liberated I_(2) required 40 ml of 0.5 M Na_(2)S_(2)O_(3) solution for the end point using starch is indicator. Find the molairty and volume strength of the H_(2)O_(2) solution.
Answer» 1.12 gm lit 2.24 gm/lit 5.6 gm/lit NONE Solution :Meq of `H_(2)O_(2)` M 50 ml = m.eq of Hypo = `40xx0.5=20` meq Now NORMALITY = `(20)/(50)=0.4N` `IMPLIES M=0.2M` `therefore` Volume strength = `Mxx11.2=0.2xx112=2.24gm//lit.`