The quantity of atmoshperic SO2 (g) can be determined by reaction with H2O2 (aq)

Question

The quantity of atmoshperic SO2 (g) can be determined by reaction with H2O2 (aq), according to the balanced chemical equation...

H2O2(aq)+SO2(g) ---> H2SO4 (aq)

The amount of sulfuric acid produced can be determined by titration with sodium hydroxide of known concentration. An 611.0 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(aq) produced, calculate the mass percentage of SO2(g) in the air sample

Please and Thank you!!!

Explanation / Answer

H2SO4 produced=N1V1=18.50*10-3*0.00250=4.625*10-5 equivents=2.3125*10-5 moles

from the euation no of moles of SO2= no of moles of H2SO4

no of moles of so2=2.3125*10-5=2.3125*10-5*64=1.48*10-3 gms

mass %=1.48*10-3 /611*100=2.422*10-4%

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