Chapter 4, Problem 4.96QP

The SO₂ present in air is mainly responsible for the acid rain phenomenon. Its concentration can be determined by titrating against a standard permanganate solution as follows:

$5{\text{SO}}_2+2{\text{MnO}}_4^{-}+2{\text{H}}_2\text{O}\to {\text{5SO}}_4^{2-}+2{\text{Mn}}^{2+}+4{\text{H}}^{+}$

Calculate the number of grams of SO₂ in a sample of air if 7.37 mL of 0.00800 M KMnO₄ solution are required for the titration.