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Electrolysis of salt water

Hydrogen, chlorine and an alkaline solution from brine.

Topic: ElectrochemistryGrade: 11Free

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What you do

  1. Switch on the electrodes and watch both electrodes.
  2. Why does the phenolphthalein turn pink?
  3. Test with a burning splint.
  4. Test with damp litmus paper.

Safety in a real lab

⚠ Chlorine is toxic. In a real lab this is done in a fume cupboard.

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