Exploring Chemical Analysis
Exploring Chemical Analysis
5th Edition
ISBN: 9781429275033
Author: Daniel C. Harris
Publisher: Macmillan Higher Education
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Chapter 15, Problem 15.21P
Interpretation Introduction

Interpretation:

Value of E and percent increase in [Ca2+] required to get same voltage has to be calculated.

Concept Introduction:

Potential difference with selectivity coefficient included is evaluated by expression as follows:

  E=constant+β(0.05916)2log([Ca2+]+kCa2+, Mg2+[Mg2+])

Here,

β is constant with value unity for most electrodes.

kCa2+, Mg2+ denotes selectivity coefficient.

[Ca2+] denotes concentration of Ca2+ analyte solution.

[Mg2+] denotes concentration of Mg2+ solution.

E denotes potential difference.

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