Electrolysis

• During electrolysis, which electrode are the positive ions attracted to? 


  the cathode (negative)

  
• Why can ionic solids not undergo electrolysis?

  Their ions can’t move - too stable

  
• Do ions get reduced or oxidised at the anode?

  Oxidised
• During the manufacturing of aluminium from bauxite, which

  electrode is aluminium formed at?

  Cathode
• In what situation will hydrogen gas be given out during the electrolysis of an aqueous solution of an ionic solid?

  When the ionic solid is a metal hydride or contains a metal that is less reactive than hydrogen.
• If halide ions are present in an aqueous solution of an ionic solid, will oxygen gas be released?

  No. If no halide ions are present, oxygen gas will be produced at the positive electrode instead