Metals below carbon in the reactivity series
4 marks · NormalThe table shows some metals and their relative position in the reactivity series.
| Metal | Position (1 = most reactive) |
|---|---|
| Potassium | 1 |
| Zinc | 6 |
| Iron | 7 |
| Copper | 10 |
Identify which of these metals can be extracted from its oxide using carbon.
Give a reason for your answer.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) Zinc and iron
(b) Because they are below carbon in the reactivity series, so carbon can reduce their oxides.
Also accept: Accept answers stating 'Zinc and Iron' and alternative correct explanations.
Common mistakes: Including potassium as possible; Not giving an explanation in part (b)
Show mark scheme and worked solution
Marking points
B1_a (a) · 1 mark · Identifies zinc as extractable with carbon.
B2_a (a) · 1 mark · Identifies iron as extractable with carbon.
B1_b (b) · 2 marks · Explains that these metals are below carbon in the reactivity series, so carbon is a suitable reducing agent.
Worked solution
a) Zinc and iron can be extracted with carbon. b) Carbon can reduce oxides of metals below it in the reactivity series, like zinc and iron, but not of metals above it like potassium.