Many significant chemical reactions are electrochemical in nature. In order to understand electrochemical reactions, it is necessary to understand the terms and concepts of electricity and extend these to apply to electrochemical relationships.
Electrochemical reactions are chemical reactions in which electrons are transferred.
This current is distributed to different rooms in six to ten circuits, each protected by a separate fuse or circuit breaker of 15 A or 30 A capacity. Chemists use the coulomb, which is a SI unit, extensively in the calculations of electrochemical stoichiometry. A charge of one coulomb is passed when a current of one ampere flows for a time of one second, so the coulomb is the ampere-second. Energy must be expended in order to force electrical current to flow through matter. When one joule of energy is expended in driving a current of one ampere through a resistance, the electrical resistance is one ohm.