rp 3: electrolysis

• 
  

  1. pour 50 cm3 of copper (II) chloride solution / sodium chloride solution into a beaker
  2. place a petri dish w 2 holes over the beaker
  3. put carbon graphite rods into each hole
  4. attach crocodile leads to the rods & connect them to the terminals of a low voltage power supply
  5. select 4 V on the power supply & switch it on
• what is produced at the cathode when copper (II) chloride is electrolysed?

  copper
• what is produced at the anode when copper (II) chloride is electrolysed

  chlorine gas - test w damp blue litmus paper
• what is produced at the anode when sodium chloride is electrolysed?

  chlorine gas
• what is produced at the cathode when sodium chloride is electrolysed?

  hydrogen gas - test w lit splint