4.8.2.2 Metals can be extracted from Explain why and how 1 Recall the reactivity series. Students can extract molten compounds using electrolysis is used to zinc from zinc iodide Give reasons why some electrolysis. Electrolysis is extract some metals electrolysis. metals have to be extracted by used if the metal is too from their ores. electrolysis. Class demonstration or reactive to be extracted by demo: reaction of zinc Write balanced equations for reduction with carbon or if with iodine the reactions that occur at both the metal reacts with carbon. electrodes. Research how Large amounts of energy are aluminium is extracted used in the extraction Draw a cartoon strip to from its ore. process to melt the describe how aluminium is compounds and to produce extracted from its ore, Ask pupils to suggest the electrical current. including what happens at the how they would test anode and cathode. Faraday's first law of Aluminium is manufactured electrolysis. What by the electrolysis of a Students can produce a measurements would molten mixture of aluminium model of the process using cut they take? oxide and cryolit using out electrodes and electrons. positive electrodes (anode) Students produce an in made of carbon. The anodes the diary of Humphrey Davy or have to be replaced from Robert Bunsen describing how time to time. they produced pure metals using electrolysis. WS 1.4 Explain technological applications of science.
4.8.2.2 Metals can be extracted from molten compounds using electrolysis. Electrolysis is used if the metal is too reactive to be extracted by reduction with carbon or if the metal reacts with carbon. Large amounts of energy are used in the extraction process to melt the compounds and to produce the electrical current. Aluminium is manufactured by the electrolysis of a molten mixture of aluminium oxide and cryolit using positive electrodes (anode) made of carbon. The anodes have to be replaced from time to time. Explain why and how electrolysis is used to extract some metals from their ores. 1 Recall the reactivity series. Give reasons why some metals have to be extracted by electrolysis. Write balanced equations for the reactions that occur at both electrodes. Draw a cartoon strip to describe how aluminium is extracted from its ore, including what happens at the anode and cathode. Students can produce a model of the process using cut out electrodes and electrons. Students produce an in the diary of Humphrey Davy or Robert Bunsen describing how they produced pure metals using electrolysis. WS 1.4 Explain technological applications of science. Students can extract zinc from zinc iodide electrolysis. Class demonstration or demo: reaction of zinc with iodine Research how aluminium is extracted from its ore. Ask pupils to suggest how they would test Faraday's first law of electrolysis. What measurements would they take?
AQA-8465-SOW-GSE.DOCX