Question icon
Grade 11Inorganic Chemistry

an oleum sample is labelled as (100+x)% and it contain 80/3 % free sulphur dioxide by weight.... x=?

Profile image of Vatsal Koradia
15 Years agoGrade 11
Answers icon

1 Answer

Profile image of SAGAR SINGH - IIT DELHI
15 Years ago

Dear student,

Use stoichiometry concept...

Oleums can be described by the formula ySO3.H2O where y is the total molar sulfur trioxide content. The value of y can be varied, to include different oleums. They can also be described by the formula H2SO4.xSO3 where x is now defined as the molar free sulfur trioxide content. Oleum is generally assayed according to the free SO3 content by weight