Extraction of Metals & Reduction (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Metal extraction
Metal extraction
Obtaining pure metals from naturally occurring ores
Ores
Ores
Naturally occurring compounds containing metals
Purpose of reduction in metal extraction
Purpose of reduction in metal extraction
To remove oxygen from metal oxides
Two main methods of metal extraction
Two main methods of metal extraction
Reduction by carbon and electrolysis
Metals extracted by reduction with carbon
Metals extracted by reduction with carbon
Metals less reactive than carbon (e.g., iron)
Smelting
Smelting
Heating metal oxides with carbon to extract metals
Ore used to extract iron
Ore used to extract iron
Iron(III) oxide ()
Metals extracted by electrolysis
Metals extracted by electrolysis
More reactive metals, e.g., aluminium (above carbon)
Why electrolysis is more expensive
Why electrolysis is more expensive
It is energy-intensive
Native metals
Native metals
Metals found pure in nature, e.g., gold and platinum
Why native metals need no chemical reduction
Why native metals need no chemical reduction
They are so unreactive they don't form ores