Exercise Electrochemistry
2
Analytical Exercise (Position of ions in the elctrochemical series) 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. Mr.OOI June/2006 1 Carbon Carbon Hydrochlo ric acid 1.0 moldm - Carbon Carbon Hydrochlo ric acid 0.00001 Carbon Carbon Potassium iodide solution 0.5 moldm -3
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Transcript of Exercise Electrochemistry
Analytical Exercise (Position of ions in the elctrochemical series)
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?
Mr.OOI June/20061
CarbonCarbon
Hydrochloric acid1.0 moldm-3
CarbonCarbon
Hydrochloric acid0.00001 moldm-3
CarbonCarbon
Potassium iodide solution0.5 moldm-3
