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Siegfried Sauerstoff prepared a KHP solution by dissolving 2.460 g of solid KHP (molar mass 204.2) in water to obtain 250.0 mL of solution. S.S. then titrated 25.00 mL of vinegar with his standard NaOH solution, and got a light pink color after adding 16.33 mL of base. What is the concentration of acetic acid in this vinegar sample in moles/liter? What is the concentration of the vinegar in weight percent? (Assume a density of 1.030 g/mL.) If the pH of the vinegar was 3.44, what value is obtained for the Ka of acetic acid?

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