Question

Which of the following statements is incorrect?
A. The half-cell reactions are reversible.
B. Changing the stoichiometric coefficients of a half-cell reaction does not affect the value of
E0 because electrode potential is an intensive property.
C. E0 changes sign whenever a half-cell reaction is reversed.
D. Changing the stoichiometric coefficients of a half-cell reaction does affect the value of
E0 because electrode potential is an extensive property.

Answer 1

D. Changing the stoichiometric coefficients of a half-cell reaction does affect the value of E0 because electrode potential is an extensive property. Traditionally, the reference electrode is the standard hydrogen electrode (SHE).

An electrode potential is the electromotive force of a galvanic cell, which consists of an experimental electrode and a reference electrode that is regarded as the norm. Electrode potential is stated to be zero volts. The potential difference is determined by the ability of electrons to move between half cells. Electrons can move between the electrodes because the chemical reaction is a redox reaction. In the case of a gas electrode, the electrode potential is influenced by the material concentrations, temperature, and pressure.

Learn more about electrode potential

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