Which metals can be extracted from their oxides by reduction with carbon?
Metals less reactive than carbon.
AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher · 5.4.1.3
Revise AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher specification point 5.4.1.3, Extraction of metals and reduction, with free active-recall flashcards. Flip through the set or review every question and answer below.
1 / 7
Which metals can be extracted from their oxides by reduction with carbon?
Metals less reactive than carbon.
What happens when a suitable metal oxide is heated with carbon?
Carbon removes oxygen from the metal oxide, leaving the metal behind.
What does reduction mean in terms of oxygen transfer?
Loss of oxygen.
What does oxidation mean in terms of oxygen transfer?
Gain of oxygen.
When carbon extracts a metal from a metal oxide, which substance is reduced and which is oxidised?
The metal oxide is reduced as it loses oxygen; carbon is oxidised as it gains that oxygen.
How does a metal’s reactivity affect the form in which it is found in the Earth?
Very unreactive metals can be found as the metal itself; most more reactive metals are found in compounds with other elements.
What is needed to extract a pure metal from a compound?
A chemical reaction.