Electrolysis
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Key Stage 4
Meaning
Electrolysis is a process in which a a liquid ionic compound is decomposed by passing an electrical current through it.
About Electrolysis
- In electrolysis two electrodes (an anode and a cathode) are placed in either a molten or aqueous ionic compound.
- The positive ions are attracted to the negative electrode (cathode) and the negative ions are attracted to the positive electrode (anode).
- When the negative ions reach the anode they lose electrons to become atoms or neutral compounds.
- When the positive ions reach the cathode they gain electrons to become atoms. However, in aqueous solution if the metal ions are more reactive than Hydrogen then Hydrogen gas will be produced.