Laboratory Activity 6.3.3: Types of electrodes |
Problem statement: How does the types of electrodes influence the choice of ion for discharge?
Hypothesis: Type of electrode will influence the choice of ion to be discharged.
Variable:
» | Fixed variable : Types and concentration of electrolytes | |
» | Manipulated variable : Type of electrode | |
» | Responding variable : Types of ions discharged at the anode and the cathode |
Material: » Distilled water » Copper(II) sulphate solution |
Apparatus: » Electrolytic cell » Test tube » Carbon and copper electrodes » Switch » Connecting wires » Crocodile clip » Wooden splinter » Batteries |
► | The animation below shows the arrangement and results of the experiment.
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► | Electrolysis of copper(II) sulphate solution by using carbon electrodes
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► | Electrolysis of copper(II) sulphate solution by using copper electrodes
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► | Electrolysis of copper(II) sulphate solution by using carbon electrodes
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► | Electrolysis of copper(II) sulphate solution by using copper electrodes
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► | Different electrodes used in electrolysis lead to different product at the anode and at the cathode. | |
► | The hypothesis is accepted. |
⇲ For exercise(objective and subjective), download for free on Android OS. | ||
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