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Flashcards covering key concepts related to the extraction and uses of metals in IGCSE chemistry.
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What are most metals extracted from?
Most metals are extracted from ores found in the Earth's crust.
Why is gold found as the uncombined element in nature?
Gold is very unreactive, which is why it can be found as the metal itself.
What determines the method of extraction of a metal?
The method of extraction is related to the metal's position in the reactivity series.
How is iron extracted using carbon?
Iron is extracted by reduction of iron oxide with carbon in a blast furnace.
What is the chemical reaction for extracting iron using carbon?
2Fe2O3(s) + 3C(s) -> 4Fe(l) + 3CO2(g)