Bab 6 : Elektrokimia (Set 1)

Analytical Exercise : DILUTE ELECTROLYTE / CARBON ELECTRODE

1. In the diagrams, label the cathode with the symbol ( and label the anode with the symbol +.

2. Show the direction of the flow of the electrons with arrowhead.

3. Write the formula of all ions in the electrolyte.

4. Write the formula of ion/ions which is/are attracted to cathode.Circle the formula of ion which is selectively discharged.

5. Write the half equation to represent the discharge at cathode.

6. W hat will you observe at cathode?

7. Write the formula of ion/ions which is/are attracted to anode.Circle the formula of ion which is selectively discharged.

8. Write the half equation to represent the discharge at anode.

9. W hat will you observe at anode?

Copper(II) sulphate

acid

0.001 moldm-3

Carbon

Carbon

Hydrochloric

acid

0.00001 moldm-3

Carbon

Carbon

Potassium iodide solution

0.0001 moldm-3

Carbon

Carbon

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