The ${\left( {{{\partial E} \over {\partial T}}} \right)_P}$ of different types of half cells are as follows:
| A | B | C | D |
|---|---|---|---|
| $1 \times {10^{ - 4}}$ | $2 \times {10^{ - 4}}$ | $0.1 \times {10^{ - 4}}$ | $0.2 \times {10^{ - 4}}$ |
(Where E is the electromotive force)
Which of the above half cells would be preferred to be used as reference electrode?
Solution
A cell with less variation in EMF with temperature
is preferred as a reference electrode because it can be
used for a wider range of temperatures without much
derivation from standard value so a cell with less ${\left( {{{\partial E} \over {\partial T}}} \right)_P}$ is preferred.
About this question
Subject: Chemistry · Chapter: Electrochemistry · Topic: Electrochemical Cells
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