What is the meaning of negative potential?

So, a positive electrostatic potential at some point means that a positive (negative) charge at that point will have a higher (lower) potential energy compared to the reference point. A negative potential means that a positive (negative) charge at that point will have a relatively lower (higher) potential energy.
A.

Why electrode potential of zinc is negative?

In external circuit it is observed that the flow of electrons takes place from Zn to H. Thus it concludes that the electrons must have originated from Zn i.e. it is oxidized and it is anode and it is negative with respect to hydrogen electrode. The standard oxidation potential of zinc is therefore + 0.76V.
  • Why electrode potential of zinc is negative?

    In external circuit it is observed that the flow of electrons takes place from Zn to H. Thus it concludes that the electrons must have originated from Zn i.e. it is oxidized and it is anode and it is negative with respect to hydrogen electrode. The standard oxidation potential of zinc is therefore + 0.76V.
  • What is the half cell?

    A half cell is one of the two electrodes in a galvanic cell or simple battery. For example, in the Zn-Cu battery, the two half cells make an oxidizing-reducing couple. Placing a piece of reactant in an electrolyte solution makes a half cell.
  • What is meant by the term electrochemical series?

    Electrochemical series is a series of chemical elements arranged in order of their standard electrode potentials. The hydrogen electrode. H+(aq) + e- →← 1/2H2(g) is taken as having zero electrode potential. An electrode potential is, by definition, a reduction potential.

Updated: 2nd October 2019

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