A sample of oleum is such that ratio of free SO_(3) by combined SO_(3) is equal to unity. Calculate its labelling in terms of percentage oleum.

A sample of oleum is such that ratio of free SO_(3) by combined SO_(3)

1.	A sample of oleum is such that ratio of free SO_(3) by combined SO_(3) is equal to unity. Calculate its labelling in terms of percentage oleum.
Answer» Solution :Let FREE `SO_(3)RARR xg` `SO_(3)` in form of `H_(2)SO_(4)` `rarr(x)/(80)xx98=1.225x` so total `x+1.225x=100` `x=449.49` water required `=(44.94)/(80) xx18 = 10..11 G%` oleum `=100+10.11=110.11%`