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1) Codeine, a cough suppressant extracted from crude opium, is a weak base with a pKb of 5.80. What will be the pH of a 0.50 M solution of codeine? 2) What is the pH of a 0.031 M solution of chloroacetic acid, for which Ka = 1.4 x 10-3? 3) Phosphorous acid, H3PO3, is actually a diprotic acid for which Ka1 = 5.0 × 10-2 and Ka2 = 2.0 × 10-7. What are the values of [H+], [H2PO3-], and [HPO32-] in a 3.0 M solution of H3PO3? What is the pH of the solution?

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