What is electrode potential and EMF of a cell?
The electromotive force of a cell or EMF of a cell is the maximum potential difference between two electrodes of a cell. It can also be defined as the net voltage between the oxidation and reduction half-reactions. The EMF of a cell is mainly used to determine whether an electrochemical cell is galvanic or not.
What is the major difference between EMF and potential difference?
| EMF(Electromotive Force) | Potential Difference (PD) |
|---|---|
| EMF, electromotive force, refers to the voltage developed by an electrical source | Potential difference refers to the observed difference in voltage between any two points in an open circuit. |
What is another name of electrode potential?
The electric potential (also called the electric field potential, potential drop, the electrostatic potential) is defined as the amount of work energy needed to move a unit of electric charge from a reference point to the specific point in an electric field.
What is electrode potential and electrode potential difference in an electrochemical cell?
In electrochemistry, electrode potential is the electromotive force of a galvanic cell built from a standard reference electrode and another electrode to be characterized. The electrode potential has its origin in the potential difference developed at the interface between the electrode and the electrolyte.
What is meant by electrode potential?
Electrode potential for any given electrode is the voltage or potential difference of a cell assembled from a standard hydrogen electrode and the given electrode with the potential that is being defined. Electrode potential has uses such as: Prediction of corrosion-related chemical or electrochemical reactions.
What is the similarity between EMF and potential difference?
Summary of the similarities & differences between EMF & PD
| Similarities and differences of EMF and Potential Difference | |
|---|---|
| Electromotive force (EMF) | Potential Difference (PD) |
| The EMF is also present even when no current is drawn through the battery. | Potential difference across the conductor is zero in the absence of current. |
What is meant by potential in physics?
Potential generally refers to a currently unrealized ability. In physics, a potential may refer to the scalar potential or to the vector potential. In either case, it is a field defined in space, from which many important physical properties may be derived.
What does a electrolytic cell do?
An electrolytic cell converts electrical energy into chemical energy. Here, the redox reaction is spontaneous and is responsible for the production of electrical energy.
Is electrode potential and cell potential same?
The key difference between electrode potential and cell potential is that electrode potential refers to the ability of an electrode in a cell to get reduced or oxidized whereas cell potential is the difference between the electrode potentials of the electrodes present in an electrochemical cell.
What is emf of a cell in chemistry?
The electromotive force (EMF) is the maximum potential difference between two electrodes of a galvanic or voltaic cell. This quantity is related to the tendency for an element, a compound or an ion to acquire (i.e. gain) or release (lose) electrons.
What is emf of a cell?
The emf of a cell is the sum of the electric potential differences (PDs) produced by a separation of charges (electrons or ions) that can occur at each phase boundary (or interface) in the cell. The magnitude of each PD depends on the chemical nature of the two contacting phases.