Question

in case of calomel electrode potential decreases
a) As concentration of KCl increases.
b) As concentration of KCl decreases.
c) As concentration of HgCl2 increase.
d) As concentration of HgCl2 decreases.​

Answer 1

As the concentration of KCl increases, the calomel electrode potential decreases. When the concentration of chloride ions increases the electrode potential decreases.

What is a calomel electrode?

• The reaction between mercury chloride and elementary mercury is called a calomel electrode.
• It is sued in a pH meter to determine the pH of a solution.
• The molecular formula of the calomel electrode is Hg2Cl2.

So, the correct answer is A.

#SPJ2