A mixture is prepared by mixing of 20 gm SO3 in 30 gm of H2SO4 . (I) Find the mole fraction of SO3 . (II) Determine % labelling of Oleum sample

SOLUTION:

 (i)    Total wt of Oleum is 20 gm SO₃+ 30 gm H₂SO₄

(ii)

Given Wt of (Free) SO₃= 40 % Find % labelling (X)

  % labelling(X) = 109%