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WEEK 5
ELECTROLYSIS
CONTENT
- Definition of simple terms
- Faraday’s laws of electrolysis
- Simple calculations
- Applications of electrolysis
DEFINITION OF SIMPLE TERMS
Electrolysis – Is the process whereby a liquid conducts electricity by the movement of positive and negative ions within the liquid while undergoing chemical changes.
Electrolytes – Are liquid, which allows the electricity through them is called electrolytes. Such electricity is salt solutions, alkalis and dilute acids (acidulated water).
Non-Electrolytes – are liquids, which do not allow electricity to pass through them. Such liquids include distilled water, alcohol, liquid paraffin and sugar solution.
NOTE: Metals and hydrogen are deposited at the cathode, while non-metals and oxygen are deposited on the anode. The anode may dissolve in solution.
Electrolysis does not manufacture electric charges and it is the “splitting’ of compounds by electricity. E.g. water decomposes into oxygen and hydrogen by electric current.
FARADAY’S LAWS OF ELECTROLYSIS
Faraday’s first law sate that the mass of a substance liberated during the process of electrolysis is proportional to the quantity of electricity passed through the electrolyte
Faraday’s second law of electrolysis states that the relative masses of substances liberated by the same quantity of electricity are proportional to their chemical equivalents.
SIMPLE CALCULATIONS
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