The quantity of atmospheric SOg) can be determined by reaction with H202(aq), ac

Question

The quantity of atmospheric SOg) can be determined by reaction with H202(aq), according to the balanced chemical equation shown below. H,O.aq)+SO. The amount of sulfuric acid produced can be determined by titration with sodium hydroxide of known concentration. An 562.0 gram sample of an air that is known to contain sulfur dioxide was reacted with excess hydrogen peroxide. Given that 18.50 mL of a 0.00250 M NaOH(aq) were required to neutralize the H2SO4(a) produced, calculate the mass percentage of SO2(g) in the air sample. Number % so,(g)

Explanation / Answer

Moles of H2SO4 = 1/2( Moles of NaOH) =1/2(18.50 x 0.00250 )millimoles

                                                         = 0.023125

Moles OF H2SO4 = Moles Of SO2 = 0.023125 Millimoles

Mass of SO2 = Molecular mass x moles = 0.023125 x 64 = 1.48 Milligrams

% of SO2 in air = ( mass of SO2/mass of air )x100 = (1.48x10-3 x 100)/562 = 0.0002633%

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