0.5 gm of fuming `H_(2)SO_(4)` (Oleum) is diluted with water. This solution is completely
Channel: Doubtnut
Date: 2020-04-19

0.5 gm of fuming `H_(2)SO_(4)` (Oleum) is diluted with water. This solution is completely neutralised by 26.7 ml of 0.4 M `NaOH` solution. Calculate the percentage of free `SO_(3)` in the given sample. Give your answer excluding the decimal places.