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Electrolysis Revision - Coggle Diagram
Electrolysis Revision
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Set up the Bunsen burner, tripod, gauze and heatproof mat. Put the beaker on the gauze and heat the acid gently until it is almost boiling. Turn off the Bunsen burner.
Remove the glass beaker from the tripod. Use the spatula to add a small amount of copper (II) oxide powder to the hot acid. Stir with the glass rod. The copper (II) oxide will disappear and the solution will turn clear blue.
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When crystals start to form, stop heating the water bath.
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Remove the crystals from the concentrated solution with a spatula. Gently pat the crystals dry between two pieces of filter paper.
Aqueous Electrolysis
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However, some ionic substances dissolve in water, meaning ions are free to move around.
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Extracting Aluminium
Aluminium
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It can be used to produce pans, overhead power cables, aeroplanes, cooking foil, bike frames etc.
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We get aluminium oxide from bauxite ore, mined by open cast mining.
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Changes at the electrode
When ions reach an electrode, they either lose or gain electrons to become neutral (no overall charge).
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Molten Electrolysis
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Ionic substances do not conduct electricity when they are solid. Once we melt them, ions are free to move and carry chrage.
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