o 4/29/2016 06:00 PM 4.1/1004/28/2016 1 1:03 PM to -Print Calculator i-Periodic
ID: 990121 • Letter: O
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o 4/29/2016 06:00 PM 4.1/1004/28/2016 1 1:03 PM to -Print Calculator i-Periodic Table Gradebook Question 23 of 23 Map University Science Book Donald McQuarrie Peter A. Rock Ethan Gallogly The quantity of atmospheric SOx(g) can be determined by reaction with HOdag), according to the balanced chemical equation shown below. H202(aq) + sole) H,so,(aq) 11,504(aq concentration. An 506.0 gram sample of an air that is known to contain sufur dioxide was reacted with excess hydrogen peroxide. Given that 18.50 mL of a 0.00250 M NaOH(aq) were required to neutralize the The amount of sulfuric acid produced can be determined by titration with sodium hydroxide of known H2S04(aq) produced, calculate the mass percentage of SO24g) in the air sample Number % sole) e Next Exit ExitExplanation / Answer
H2SO4 + 2 NaOH = Na2SO4 + 2 H2O
18.5 ml of 0.00250 M NaOH = 18.5 x 0.00250 /1000 = 0.0000395 Moles x 2 = 0.000079 Moles
0.000079 Moles of H2SO4 was present in this sample which is directly equal to the moles of SO2 present in the air .
0.000079 Moles of SO2 (Molar mass: 64.066 g/mol) = 0.000079 x 64.06 = 0.00506074 gm of SO2 presents
Mass percentage of SO2 = 0.00506 x 100 / 506 = 0.001 %
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