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2 marksMole Concept

CSEC Chemistry · May/June 2011 · Paper 2 · Question 5(a)(ii)

Experiments I and II determined the relative reactivity of iron, copper, and an unknown Metal X (valency 2). Experiment I: Metal X in copper(II) sulphate solution resulted in copper plating and solution decolorization. Experiment II: Metal X in iron(II) sulphate solution showed no change.

Write an ionic equation for the reaction between Metal X and copper(II) sulphate. Include the relevant state symbols.

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  1. 5(a)(i)Use the information given to place Metal X, copper and iron in the order in which they will appear in the reactivity series, starting with the MOST reactive.[2 marks]
  2. 5(b)(i)What is an alloy?[1 mark]
  3. 5(b)(ii)Name the alloy of copper and aluminium.[1 mark]
  4. 5(b)(iii)State TWO properties of aluminium that make the alloy in (b) (ii) a good choice to be used in the manufacture of aircraft.[3 marks]
  5. 5(b)(iv)List TWO other uses of this alloy.[2 marks]
  6. 5(c)Calculate the mass of copper produced if 0.12 dm³ of nitrogen is produced at room temperature and pressure (rtp). (Relative atomic mass of Cu = 64; One mole of…[4 marks]

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