10- Constructinh Electrochemical Cells To Meaure Elctrode Potentials

Question 1

Describe the method to construct a electrochemical cell in CP10

Answer 1

1- Clean strips of Zinc and Copper with sandpaper + degrease by rinsing with Propanone
2- Set up Zinc half cell by adding Zinc Sulphate Solution into beaker + standing Zinc strip in beaker
3- repeat step with Copper + Copper Sulphate solution
4- Join 2 half cells with Salt bridge soaked in Potassium Nitrate solution
5- join 2 metal strips with Voltmeter with Connecting wires + Crocodile clips
6- Record + Electrode potential of cell

7- Note which half cell is connected to positive terminal = this is reduction
8- Repeat steps with other half cell combinations eg: Zn|Zn2+||Fe2+|Fe

Question 2

Show the equation of Copper + Zinc in their electrochemical cell CP 10

Answer 2

Question 3

Diagram of electrochemical cell

Answer 3