Electrolysis of aqueous solutions 2

• electrolysis of aqueous solutions


  -aqueous solutions are dissolved in water

  -water molecules ionise forming hydrogen+hydroxide ions
• where is hydrogen produced

  at the cathode if the metal is more reactive than hydrogen
• what is produced at the cathode

  hydrogen
• what happens if the solution contains halide ions


  the halogen will be produced
• what do we make in the anode

  chlorine gas
• anode reaction 


  2Cl– → Cl2 + 2e– 
• what reaction is the anode reaction

  reduction
• cathode reaction 


  2H+ + 2e– → H2 
• what reaction is the cathode reaction

  oxidation