What is the ka of the weak acid

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Question- John titrates an unknown weak acid with 0.200 M KOH. At the equivalence point, the pH was 7.72 and John added 34.4 mL of base. When he had only added 17.2 mL of KOH, the pH was 3.58. What is the Ka of the weak acid?

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Reference no: EM13697894

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