2 marksImpact of Metals on Living Systems and the Environment

CSEC Chemistry · May/June 2014 · Paper 2 · Question 5(b)(i)

Iron corrodes easily to form rust. Various methods prevent corrosion.

List the conditions necessary for the corrosion of iron.

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Other parts of this question

5(a)(i)Write a balanced equation with state symbols for the reaction that occurs between zinc and the copper(II) sulfate solution.[2 marks]
5(a)(ii)Explain why the zinc foil reacted with the copper(II) sulfate solution but the silver foil did not.[4 marks]
5(a)(iii)Would aluminium displace copper from the copper(II) sulfate solution? Give a reason for your answer.[2 marks]
5(b)(ii)Why is painting effective in preventing iron from rusting?[1 mark]
5(c)Explain why duralumin is used in preference to aluminium for the manufacture of aircraft.[4 marks]

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