A titration of 16.67 mL of an unknown basic salt, NaA, requires 25.00 mL of 0.240 M HCI to reach the equivalence point. The titration data is shown below: Volume of HCI 5.30 mL 12.50 mL 20.00 mL 25.00 mL pH 10.54 9.97 9.37 What is the value of Ka for the weak acid, HA? 5.41

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