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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
55-6 Chemical Variables
e classical form of the Nernst equation (Equation 55.10) can be formulated more generally for a
redox reaction. If a
ox
and a
red
are the activities of the oxidized and reduced form of the considered ion,
the Galvani potential dierence is given as
φ φ
= +
0
RT
zF
a
a
ln
ox
red
(55.12)
In potentiometry, the activity of a certain ion can be determined directly by the measurement of the
equilibrium Galvani potential dierence of a suitable electrode (direct potentiometry). On the other
ha
nd,
ch
anges
of th
e
ac
tivity
of th
e
de
tected
io
n
an
d
eq
uivalence
po
ints
(E
Ps)
ca
n
be de
tected
in ti
tra-
tion
r
eactions
(p
otentiometric endpoint titration ...
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Publisher Resources

ISBN: 9781439848913