Electrolysis core practical

• Electrolysis of carbon equiptment


  -Copper sulfate solution(electrolyte)

  -100ml beaker

  -2 copper strips

  -eye protection

  -power supply, ammeter,variable resistor

  -wire and crocodile clips

  -petri dish
• Why does anode lose mass in electrolysis of copper


  Copper atoms lose electrons to form Copper ions(oxidation)
• Why does cathode gain more in electrolysis of copper

  Copper ions in solutions gain electrons to form copper atoms()
• Electrolysis of copper Anode equation


  Cu(s) -> Cu2+(aq) + 2e-
• Electrolysis of copper cathofr equation


  Cu2+ + 2e- ->Cu(s)
• At end of expirement you will see impurities on floor of beaker


  Solution stays blue as concentration is constant
• What's in the beaker

  Copper sulfate solution
• Carbon electrolysis what happens to anode


  You see bubbles this is oxygen gas
• Carbon electrolysis what happens to cathode


  Stays the same
• Equation of carbon electrolysis 


  4OH- -> 2H2O + O2 + 4e-
• What is A


  Electrolyte

  
• What direction do electrons travel


  Anode-> cathode