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A 50.0 mL sample of 0.21 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, is titrated...

A 50.0 mL sample of 0.21 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, is titrated with 0.11 M KOH. Ka of CH3CH2COOH = 1.4 ✕ 10-5.

(a) Calculate the pH at the half-equivalence point.

(b) Calculate the pH at the equivalence point.

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