How did Michael Faraday's laws connect electricity with chemical change?

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Michael Faraday established the connection between electricity and chemical change by demonstrating that electrochemical decomposition is driven by the passage of electricity through a conducting liquid, rather than by action at a distance. His research led to two fundamental laws of electrolysis:1

  • First Law: The amount of a substance deposited on an electrode is directly proportional to the quantity of electricity that passes through the electrolytic cell.12
  • Second Law: The quantities of different elements deposited by the same amount of electricity are proportional to their equivalent weights.12

Faraday theorized that electrical force creates a state of tension within a solution, causing particles to migrate and dissociate when the force is sufficient to overcome their chemical affinities. The unit of charge required to liberate one gram equivalent of an ion is known as the faraday, which represents a specific quantity of electrons. This work provided a foundational understanding of the relationship between electric current and chemical bonding.1234