Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:(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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