Following are three organic acids and the pKa of each: butanoic acid, 4.82; barbituric acid, 5.00; and lactic acid, 3.85. (a) What is the Ka of each acid?
(b) Which of the three is the strongest acid, and which is the weakest?
(c) What information do you need to predict which of the three acids would require the most NaOH to reach a phenolphthalein end point?
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