Chemistry unit 5 Electrolysis

  • Electrolysis breaks down compounds into simpler substances. 
  • It is used in industrial processes. 
  • Ionic substances are decomposed by an electrical charge being passed through them during electrolysis. 
  • The ions must be free to move for this to work so the compound must be molten. 
  • When sodium chloride is dissolved in water, hydrogen and hydroxide ions are present as well as the sodium and choride ions. 
  • The ion which is selected to discharge at an electrode depends on a number of factors. 
  • The position of the ion in the electrochemical series affects its ease of discharge at an electrode. 
  • When metals react, they lose electrons to become positive ions. 
  • If a metal is placed…


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