Gce Model Questions Vol1 2021 Chemistry Question 29
Practice objective / multiple choice question 29 from the 2021 Gce Model Questions Vol1 Chemistry examination.
Atmospheric carbon dioxide and sulfur dioxide have concentrations of 400 ppm and 10 ppm respectively. Assuming equilibrium with rainwater, use Henry's law constants \(k_{\mathrm{H,CO_2}} = 3.3\times10^{-2}\ \mathrm{mol\,L^{-1}\,atm^{-1}}\) and \(k_{\mathrm{H,SO_2}} = 1.2\ \mathrm{mol\,L^{-1}\,atm^{-1}}\) to find the dissolved concentrations of \(\mathrm{CO_2}\) and \(\mathrm{SO_2}\). Treat the dissolved \(\mathrm{CO_2}\) as carbonic acid with \(K_a = 4.3\times10^{-7}\) and dissolved \(\mathrm{SO_2}\) as sulfurous acid with \(K_a = 1.5\times10^{-2}\). Estimate the pH of the resulting rainwater (ignore activity coefficients and other acids).
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This is Gce Model Questions Vol1 2021 Chemistry Question 29. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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