A gas mixture was passed at the rate of 2.50 L/min through a solution of sodium hydroxide for a total of 59.00 min. ThSO2 in the mixture was retained as sulfite ion:SO2(g) + 2OH- → SO32- + H2O After acidification with HCl, the sulfite was titrated with 5.15 mL of 0.002997 M KIO3:IO3- + 2H+SO3 + 2Cl- → ICl2- + 2SO42- + 2H+ + H2O Use 1.20 g/L for the density of the mixture and calculate the concentration of SO2 in ppm.
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