Reactivity Series and Metal ExtractionAQA GCSE Chemistry: Flashcards
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What happens when a metal reacts with oxygen?
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- What happens when a metal reacts with oxygen?
- It forms a metal oxide; the metal is oxidised (gains oxygen)
- Define oxidation and reduction in terms of oxygen.
- Oxidation = gain of oxygen; reduction = loss of oxygen
- List the reactivity series from potassium to copper, including carbon and hydrogen.
- Potassium, sodium, lithium, calcium, magnesium, carbon, zinc, iron, hydrogen, copper
- Why are more reactive metals more reactive?
- They lose electrons more easily to form positive ions
- How can an order of reactivity be deduced experimentally?
- By comparing how vigorously different metals react with water or dilute acid (e.g. rate of fizzing/hydrogen production)
- How are metals less reactive than carbon extracted from their oxides?
- By reduction with carbon, which removes the oxygen from the metal oxide
- Why is gold found as the metal itself in the Earth?
- Because it is so unreactive it does not readily form compounds
- How must metals more reactive than carbon be extracted?
- By electrolysis, since carbon cannot reduce their oxides
- What does OIL RIG stand for?
- Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons)
- In iron(III) oxide + carbon → iron + carbon dioxide, which substance is reduced?
- Iron oxide is reduced (it loses oxygen)
- What is a displacement reaction?
- A reaction where a more reactive metal takes the place of a less reactive metal in a compound
- (HT) In a displacement reaction, which species loses electrons?
- The more reactive metal (in its uncombined form), which is oxidised as it forms ions