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(A) The potential of a single half-cell cannot be measured in isolation. To determine the potential of any half-cell,it is connected to a Standard Hyd

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By connecting it to a Standard Hydrogen Electrode $(SHE)$ and measuring the cell potential.

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(A) The potential of a single half-cell cannot be measured in isolation. To determine the potential of any half-cell,it is connected to a Standard Hydrogen Electrode $(SHE)$ to form a complete electrochemical cell. The potential of the $SHE$ is arbitrarily assigned as $0.00 \ V$. The cell potential $(E_{cell})$ is measured using a voltmeter. Since $E_{cell} = E_{cathode} - E_{anode}$,if the half-cell acts as the cathode,$E_{half-cell} = E_{cell} + E_{SHE}$. If it acts as the anode,$E_{half-cell} = E_{SHE} - E_{cell}$.

Give the method to determine the potential of any half-cell.

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