Calculate the pH of a buffer solution containing 10.0 cm3 of 0.100 mol dm–3 NaOH and 20.0 cm3 of 0.500 mol dm–3 ethanoic (acetic) acid made up to a total of 50.0 cm3 in a volumetric flask at 298 K. The pKa of ethanoic acid at 298 K is 4.77

Calculate the pH of a buffer solution containing 10.0 cm3 of 0.100 mol dm–3 NaOH and 20.0 cm3 of 0.500 mol dm–3 ethanoic (acetic) acid made up to a total of 50.0 cm3 in a volumetric flask at 298 K. The pKa of ethanoic acid at 298 K is 4.77

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter5: Equilibrium, Activity And Solving Equations

Section: Chapter Questions

Problem 10P

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Concept explainers

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.

Question

Calculate the pH of a buffer solution containing 10.0 cm³ of 0.100 mol dm^–3NaOH and 20.0 cm³ of 0.500 mol dm^–3ethanoic (acetic) acid made up to a total of 50.0 cm³ in a volumetric flask at 298 K. The pK_a of ethanoic acid at 298 K is 4.77

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