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Science

Electrolysis

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Electrolysis is the decomposition of a liquid using electricity. When ionic compounds are molten or dissolved in water the ions are free to move.

When sulfuric acid is electrolysed, hydrogen is produced at the cathode (negative electrode) and oxygen at the anode (positive electrode). Aluminium is extracted from the mineral bauxite using the process of electrolysis.

Electrolysis

When ionic compounds are molten or dissolved in water the ions are free to move. When electricity is passed through the liquid the compound may be broken down into different substances.

Some important terms

  • Electrolysis - the decomposition of a liquid using electricity
  • Electrolyte - a liquid which conducts electricity
  • Anode - the positive electrode
  • Cathode - the negative electrode
  • Anions - negative ions - attracted to the anode
  • Cations - positive ions - attracted to the cathode
diagram of electrolysis

Electrolysis

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