A 0.288-g sample of an unknown monoprotic organic acid is dissolved in water and titrated with a

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A 0.288-g sample of an unknown monoprotic organic acid is dissolved in water and titrated with a 0.115 M sodium hydroxide solution. After the addition of 17.54 mL of base, a pH of 4.92 is recorded. The equivalence point is reached when a total of 33.83 mL of NaOH is added.
a. What is the molar mass of the organic acid?
b. What is the Ka value for the acid? The Ka value could have been determined very easily if a pH measurement had been made after the addition of 16.92 mL of NaOH. Why?
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General Chemistry

ISBN: 978-1439043998

9th edition

Authors: Darrell Ebbing, Steven D. Gammon

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