A potassium ion-selective electrode is used to measure the concentration of potassium ion in a solution that contains 6.0 x 10-3 M cesium (activity). The electrode responds equally to either ion (KKC = 1). If the potential versus a reference electrode is -18.3 mV for a 5.0 x 10-3 M KCI solution and +20.9 mV in the sample solution, what is the activity of K+ in the sample? Assume Nernstian response %3!

A potassium ion-selective electrode is used to measure the concentration of potassium ion in a solution that contains 6.0 x 10-3 M cesium (activity). The electrode responds equally to either ion (KKC = 1). If the potential versus a reference electrode is -18.3 mV for a 5.0 x 10-3 M KCI solution and +20.9 mV in the sample solution, what is the activity of K+ in the sample? Assume Nernstian response %3!

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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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

A potassium ion-selective electrode is used to measure the concentration of potassium ion
in a solution that contains 6.0 x 10-3 M cesium (activity). The electrode responds equally
to either ion (KK.C = 1). If the potential versus a reference electrode is -18.3 mV for a 5.0
x 10-3 M KCI solution and +20.9 mV in the sample solution, what is the activity of K+ in
the sample? Assume Nernstian response

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