Question

Elemental sulfur can be converted to sulfur dioxide by combustion in air. Sulfur dioxide will react with water to form sulfurous acid (see balanced equation below).

SO2(g) + H2O(l) → H2SO3(l)

What mass of sulfur dioxide is needed to prepare 29.36 g of H2SO3(l)?



A. 0.4582 g


B. 29.36 g


C. 37.61 g


D. 22.91g

Answer 1

SO2(g) + H2O(l) → H2SO3(l)
mols H2SO3 needed = grams/molar mass = 29.36/82 = estimated 0.3
1 mol SO2 provides 1 mol H2SO3; therefore, approx 0.3 mol H2SO3 will need approx 0,3 mol SO2.
grams SO2 = mols SO2 x molar rmass SO2 = ? Remember my numbers are estimates.