(b) Sodium hydroxide reacts with propanoic acid in the following equation:NaOH + CH3CH,COOHCH3CH2COONA + HLOA buffer solution is formed when sodium hydroxide is added to an excess of aqueouspropanoic acid.(i) Calculate the number of moles of propanoic acid in 50.0 cm of 0.125 mol dmaqueous propanoic acid.(ii)Use your answers to part (b)(i) to calculate the number of moles of propanoicacid in the buffer solution when 2.00 cm' of 0.500 mol dm aqueous sodium-3hydroxide are added to50.0 cm' of 0.125 mol dmaqueouspropanoic acid.) Hence calculate the pH of this buffer solution at 298.15 K.

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Answered: NAOH + CH;CH2COOHCH3CH;COONA + H2O A…

NAOH + CH;CH2COOHCH3CH;COONA + H2O A buffer solution is formed when sodium hydroxide is added to an excess of aqueous propanoic acid.

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 64QAP

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Question

(b) Sodium hydroxide reacts with propanoic acid in the following equation:
NaOH + CH3CH,COOHCH3CH2COONA + HLO
A buffer solution is formed when sodium hydroxide is added to an excess of aqueous
propanoic acid.
(i) Calculate the number of moles of propanoic acid in 50.0 cm of 0.125 mol dm
aqueous propanoic acid.
(ii)
Use your answers to part (b)(i) to calculate the number of moles of propanoic
acid in the buffer solution when 2.00 cm' of 0.500 mol dm aqueous sodium
-3
hydroxide are added to
50.0 cm' of 0.125 mol dm
aqueous
propanoic acid.
) Hence calculate the pH of this buffer solution at 298.15 K.

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