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Unformatted text preview: Example: In a 0.12 M solution of a weak monoprotic acid, HY, the acid is 5.0% ionized. Calculate K a for this acid. Using Ka to get pH, the % dissociation: The pH of a 0.10 M solution of a weak monoprotic acid, HA, is found to be 2.97. What is the value for K a ? Now calculate the percent ionization for the 0.15 M acetic acid. Calculate the concentrations of the species in 0.15 M hydrocyanic acid, HCN, solution. e'll fill this out and compare them: K a = 4.0 x 10-10 for HCN W 0.15 M HCN 0.15 M acetic acid % pH [H + ] K a Solution...
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