Electrolytic deposition and quantity of electricity (Faraday's first law)

Article no. P1147501 | Type: Experiments

10 Minutes
20 Minutes
grades 10-13
Teachers/Professors
medium
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Principle

During an electrolysis reaction, the deposited mass m of a substance is directly proportional to the flow of charge (First Faraday's law). The second Faraday law states that the electrochemical equivalents k (deposited mass per charge unit) behave like the equivalent masses (molar mass M divided by the valency z) of the elements. Both laws can be confirmed experimentally by water decomposition using an apparatus according to Hofmann.

 

Learning objectives

  • Faraday law
  • Water decomposion by electrolysis
  • Calculation of deposited mass during an electrolysis

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