Question

What is an electrochemical reaction?

Answer 1

Electrochemical reaction:

• Those chemical reactions in which electrical energy is consumed or produced are known as electrochemical reactions.
• It is a process in which electrons flow between a solid electrode and a substance, such as an electrolyte.
• This flow triggers an electric current through the electrodes, causing the reaction to liberate or absorb heat.
• For example- In galvanic cell Zinc(Zn) and Copper(Cu) is used for a redox reaction to take place.
• $\underset{\mathrm{Zink}}{\mathrm{Zn}\left(\mathrm{s}\right)}+\underset{\mathrm{Copper}\mathrm{Ion}}{{\mathrm{Cu}}^{+2}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Zink}\mathrm{Ion}}{{\mathrm{Zn}}^{+2}\left(\mathrm{aq}\right)}+\underset{\mathrm{Copper}}{\mathrm{Cu}\left(\mathrm{s}\right)}$

Electrochemical cell:

An electrochemical cell is a device capable of either generating electrical energy from chemical reactions or facilitating chemical reactions through the introduction of electrical energy.