The $\left(\frac{\partial E}{\partial T}\right)_p$ of different types of half cells are as follows: A B C D 1 × 10 -4 2 × 10 -4 0.1 × 10 -4 0.2 × 10 -4 (Where E is the electromotive force) Which of the above half cells would be preferred to be used as reference electrode?

Question

The  $\left(\frac{\partial E}{\partial T}\right)_p$  of different types of half cells are as follows: A B C D 1 × 10 -4 2 × 10 -4 0.1 × 10 -4 0.2 × 10 -4 (Where E is the electromotive force) Which of the above half cells would be preferred to be used as reference electrode?

cdquestions Admin · Accepted Answer

A reference electrode is preferred when it exhibits minimal variation in electromotive force (EMF) with temperature. This characteristic allows the electrode to be used across a broader range of temperatures without deviating significantly from the standard value. Therefore, electrodes with lower rates of change in EMF with respect to temperature ( $\frac{\partial E}{\partial T}$ ​ at constant pressure) are preferred for their stability across diverse temperature conditions.

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The $\left(\frac{\partial E}{\partial T}\right)_p$ of different types of half cells are as follows:
A B C D
1 × 10^-4 2 × 10^-4 0.1 × 10^-4 0.2 × 10^-4
(Where E is the electromotive force)
Which of the above half cells would be preferred to be used as reference electrode?

The Correct Option is C

Solution and Explanation

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The (∂E∂T)p\left(\frac{\partial E}{\partial T}\right)_p(∂T∂E​)p​ of different types of half cells are as follows:ABCD1 × 10-42 × 10-40.1 × 10-40.2 × 10-4(Where E is the electromotive force)Which of the above half cells would be preferred to be used as reference electrode?