Developing Starter: Extracting metals brainstorm Exploring: Resources n/a Students carry Recall how metals are extracted from Ask students to work in to from 9Fe out experiments Extracting metals ores from the Earth’s crust. list bullet points about how metals from metal Exploring to extract Recall that the extraction of some occur in the Earth’s crust and how to oxides Science. metals from metals is more difficult than others, obtain pure metals. Form groups and Students can four metal depending on the metal’s reactivity. ask for group list of bullet points. write balanced oxides, by Explain why some elements have been equations for the heating with isolated for much longer than others. Exploring: Extracting metals from reactions taking carbon Securing metal oxides place. (powdered Explain what happens in oxidation and Students out experiments to charcoal). reduction. extract metals from four metal Describe how metals are extracted oxides, by heating with carbon Demonstrate from ores by heating with carbon (powdered charcoal). the and electrolysis. decomposition Explain why the method used to Explaining: Electrolysis of molten zinc of zinc extract a metal is related to its position chloride chloride into in the reactivity series and cost of the Demonstrate the decomposition of zinc and extraction process. zinc chloride into zinc and chlorine chlorine using Exceeding using electrical energy. electrical Describe the movement of ions in energy. electrolysis. Plenary: Thinking about metals Explain how oxidation and reduction Plus, Minus, Interesting: Aluminium is happen during electrolysis. extracted from aluminium oxide using electricity. (Possible answers: Plus – aluminium is available to make many objects, such as aircraft, foil, drinks cans; Minus the extraction is – expensive; Interesting when – aluminium was first extracted, it was more valuable than silver.) Written by Mark Levesley, Iain Brand, Penny Johnson, Sue Kearsey and Sue Robilliard.
Developing Recall how metals are extracted from ores from the Earth’s crust. Recall that the extraction of some metals is more difficult than others, depending on the metal’s reactivity. Explain why some elements have been isolated for much longer than others. Securing Explain what happens in oxidation and reduction. Describe how metals are extracted from ores by heating with carbon and electrolysis. Explain why the method used to extract a metal is related to its position in the reactivity series and cost of the extraction process. Exceeding Describe the movement of ions in electrolysis. Explain how oxidation and reduction happen during electrolysis. Starter: Extracting metals brainstorm Ask students to work in to list bullet points about how metals occur in the Earth’s crust and how to obtain pure metals. Form groups and ask for group list of bullet points. Exploring: Extracting metals from metal oxides Students out experiments to extract metals from four metal oxides, by heating with carbon (powdered charcoal). Explaining: Electrolysis of molten zinc chloride Demonstrate the decomposition of zinc chloride into zinc and chlorine using electrical energy. Plenary: Thinking about metals Plus, Minus, Interesting: Aluminium is extracted from aluminium oxide using electricity. (Possible answers: Plus – aluminium is available to make many objects, such as aircraft, foil, drinks cans; Minus – the extraction is expensive; Interesting – when aluminium was first extracted, it was more valuable than silver.) Exploring: Extracting metals from metal oxides Students can write balanced equations for the reactions taking place. Resources from 9Fe Exploring Science. n/a Students carry out experiments to extract metals from four metal oxides, by heating with carbon (powdered charcoal). Demonstrate the decomposition of zinc chloride into zinc and chlorine using electrical energy. Written by Mark Levesley, Iain Brand, Penny Johnson, Sue Kearsey and Sue Robilliard.
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