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Published byCameron Washington Modified over 9 years ago
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Do now! Can you stick the summary and word sheets in?
Don’t forget we have a test on Friday (topics 9e and 9f)
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Last lesson Extraction of metals from their ores related to the reactivity series
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Ores Most metals are found naturally in rocks called ores. They are in compounds, chemically bonded to other elements iron ore
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Native Some unreactive metals can be found as elements. They are called native metals.
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Roasting Some unreactive metals can be extracted from a compound simply by heating. This is called roasting.
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More reactive metals? Zinc, iron, tin, lead
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Extracting metals with carbon
Carbon is higher than some metals in the reactivity series. It can be used to extract medium reactive metals.
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Extracting metals with carbon
lead oxide + carbon lead + carbon dioxide 2PbO(s) + C(s) 2Pb(s) + CO2(g)
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Extracting metals with carbon
lead oxide + carbon lead + carbon dioxide 2PbO(s) + C(s) 2Pb(s) + CO2(g) carbon is oxidised lead oxide is reduced
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The Blast furnace YouTube - Steelmaking: Blast Furnace Molten iron
Iron ore (haematite), coke (carbon) and limestone (calcium carbonate) Hot waste gases (recycled to heat furnace) 1000°C YouTube - Steelmaking: Blast Furnace 1500°C 1900°C Blasts of hot air Blasts of hot air Molten iron
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More reactive metals?
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Electrolysis of aluminium oxide
CO2
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Let’s extract a metal!
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Carbon + copper oxide copper + carbon dioxide
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Today’s lesson Uses of metals
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Gold Unreactive, malleable and a good conductor of electricity
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Gold Unreactive, malleable and a good conductor of electricity
Jewelry, wires in computers, gold leaf
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Aluminium Light, and a very unreactive oxide layer forms over the reactive metal means it does not corrode
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Aluminium Light, and a very unreactive oxide layer forms over the reactive metal means it does not corrode Aircraft, cars, cutlery etc.
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Steel (mainly iron) Strong, fairly cheap.
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Steel (mainly iron) Strong, fairly cheap. Building
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Copper Ductile, unreactive and a good conductor
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Copper Ductile, unreactive and a good conductor Saucepans, wires etc.
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Let’s go for a walk! Looking for uses of metals
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Reading?! Pages 84 and 85
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Next topic?
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