If the standard reduction potential of a half-cell is positive, the reduction reaction is spontaneous when paired with a hydrogen electrode
Explanation:
The relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell.
If the standard reduction potential of a half-cell is positive, the reduction reaction is spontaneous when paired with a hydrogen electrode.
The reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.
The reduction to happen the electrons gained by the material that is being decreased must be transported from the atoms of ions of a different material.
