Question

Which of the following is not the characteristics of a calomel electrode?

(a) The potential of electrode is not temperature dependent

(b) Preparation of electrode is easy

(c) Value of potential or emf is higher for lower concentration of Kcl

(d) Value of potential decreases with increasing concentration of Kcl

The question was asked in an interview.

I would like to ask this question from Secondary Reference Electrodes in section pH Meters and Ion Analysers of Analytical Instrumentation

Answer 1

Right choice is (a) The potential of electrode is not temperature dependent

Easiest explanation: The potential of calomel electrode is temperature dependent. When temperature changes potential comes to a new value. It cannot be used in places where high temperatures exist.