The standard oxidation potential of a calomel | vedclass

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(D) The calomel electrode is a secondary reference electrode consisting of mercury $(Hg)$ and mercury$(I)$ chloride $(Hg_2Cl_2)$.The standard reductio

Vedclass · Accepted Answer

$-0.28 \ V$

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(D) The calomel electrode is a secondary reference electrode consisting of mercury $(Hg)$ and mercury$(I)$ chloride $(Hg_2Cl_2)$.The standard reduction potential $(E^\circ_{red})$ of the saturated calomel electrode is approximately $+0.242 \ V$ to $+0.28 \ V$ depending on the concentration of $KCl$.By convention,the standard oxidation potential $(E^\circ_{ox})$ is the negative of the standard reduction potential $(E^\circ_{ox} = -E^\circ_{red})$.Therefore,for a standard calomel electrode,the oxidation potential is approximately $-0.28 \ V$.

The standard oxidation potential of a calomel electrode is:

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