What is the pH of a 0.1 M NaH22AsO44 solution to the nearest tenth of a pH unit? For H33AsO44, Kaa11 = 5.8 x 10−−33, Kaa22 = 1.1 x 10−−77, Kaa33 = 3.2 x 10−−1122.
concentration of NaH2AsO4 = 0.1 M
H2AsO4- -----------> HAsO42- + H+
Ka1 = 5.8 x 10^-3 , pKa1 = 2.237
Ka2 = 1.1 x 10^-7 , pKa2 = 6.96
Ka3 = 3.2 x 10^-12 , pKa3 = 11.50
pH = pKa1 + pKa2 / 2
= 2.237 + 6.96 / 2
pH = 4.60
What is the pH of a 0.1 M NaH22AsO44 solution to the nearest tenth of a...
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