1. Describe the source of pH dependence in a glass membraneelectrode.2. Describe the alkaline error in the measurement of pH. Underwhat circumstances is this error appreciable? How are pH dataaffected by alkaline error?

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1. Describe the source of pH dependence in a glass membrane electrode.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.7QAP

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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

1. Describe the source of pH dependence in a glass membrane
electrode.
2. Describe the alkaline error in the measurement of pH. Under
what circumstances is this error appreciable? How are pH data
affected by alkaline error?

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