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A solution of the weak acid HA was titrated with 0.100 M NaOH. the pH measured when vb=ve was 4.62 mL was 4.62 mL. Calculate the Ka of weak acid. (vb= added base volume, ve= equivalence point reading)

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mols NaOH = M x L = ?
pH = 4.62 mL?????
Please rephrase the question of supply additional information.

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