Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 23, Problem 23.25QAP
Interpretation Introduction

(a)

Interpretation:

The pMg of the solution should be determined.

Concept introduction:

pX = logax=n(EcellK)0.0592

K=EJEref+L

n − number of electrons

K − constant

L − constant

EJ − junction potential

Eref − reference electrode potential

Interpretation Introduction

(b)

Interpretation:

The range of Mg2+ activities within which the true value might be expected should be determined.

Concept introduction:

pX = logax=n(EcellK)0.0592

K=EJEref+L

n − number of electrons

K − constant

L − constant

EJ − junction potential

Eref − reference electrode potential

Interpretation Introduction

(c)

Interpretation:

The relative error in [Mg2+] associated with the uncertainty in Ej should be determined.

Concept introduction:

Relative error = (Measured - Actual)Actual×100%

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