A sample of fuming `H_2SO_4` contains `H_2SO_4,SO_3` and `SO_2.2.0g` of the above sample
Channel: Doubtnut
Date: 2020-07-12

A sample of fuming `H_2SO_4` contains `H_2SO_4,SO_3` and `SO_2.2.0g` of the above sample was dissolved in water to make a 500 mL solution. 50 " mL of " the above solution on titration in presence of methyl orange requires 42.4 " mL of " 0.1 N NaOH. On the other hand , 100 " mL of " the same sample solution requires 1.85 " mL of " 0.1 N of `I_2` where `I_2` is reduced to `I^(ɵ)` ions. Determine the percentage composition of oleum sample. (In methyl orange,  `SO_2+H_2OtoH_2SO_3overset(NaOH)toHSO_3^(ɵ))`