Related Topics:
GCSE/IGCSE Chemistry
Chemistry Required Practicals
GCSE/IGCSE Physics
GCSE/IGCSE Biology
GCSE/IGCSE Maths
Investigate what happens when two different aqueous solutions are electrolysed using inert electrodes.
In this practical you will:
Method:
Electrolysis - GCSE Science Required Practical
How to carry out a simple electrolysis of copper chloride and sodium sulphate and write half-equations.
Copper Chloride:
At the Anode:
2Cl- -> Cl2 (g) + 2e-
At the Cathode:
Cu2+ + 2e- -> Cu(s)
Sodium Sulphate:
At the Anode:
4OH- -> O2 (g) + 4e-
+ 2H2O (l)
At the Cathode:
2H+ + 2e- -> H2(g)
The following diagram gives a flowchart for the electrolysis of molten and aqueous compounds with inert electrodes. This flowchart is useful to determine what products will be formed at the cathode and anode for different electrolytes. Scroll down the page for examples and solutions.
Describe how to investigate what happens when aqueous solutions undergo electrolysis. Copper Chloride and Sodium Chloride.
Copper Chloride:
At the Anode:
2Cl- -> Cl2 (g) + 2e-
At the Cathode:
Cu2+ + 2e- -> Cu(s)
Sodium Chloride:
At the Anode:
2Cl- -> Cl2 (g) + 2e-
At the Cathode:
2H+ + 2e- -> H2(g)
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