Salt Bridge

A salt bridge is an important component of an electrochemical cell. This type of cell can produce an electric current as a product of a chemical reaction type known as oxidation-reduction (also known as redox). The cell reaction is divided into two parts: oxidation (electron loss) and reduction (electron gain). The salt bridge exists to provide the electrical connection between the two reaction vessels while keeping the two reactions separate. The salt bridge allows the electron transfer between the two vessels.

A salt bridge can be a U-tube device filled with an electrolyte, such as potassium chloride. There are many examples of such a reaction, one being the modified Daniell cell. Others include dry cells, batteries, fuel cells, galvanic cells, and accumulators.

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