50 cm³ of 1 M copper (II) sulphate solution was placed in 100 cm

      

50 cm³ of 1 M copper (II) sulphate solution was placed in 100 cm ³ plastic beaker. The temperature of the solution was measured. Excess metal A powder was added to the solution, the mixture stirred, and the maximum temperature of the mixture measured. The experiment was repeated using powders of metals B and C. The results obtained are given in the table below;

i) Arrange the metals A, B, C and copper in order of reactivity starting with the least reactive. Give reasons for the order.
ii) Other than temperature change, state one other observation that was made when the most reactive metal was added to copper (II) sulphate solution

  

Answers

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i) Copper, C, A, B.

The higher the reactivity the higher the enthalpy change for the reaction.

ii) the Blue colour of the solution faded

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johnmulu answered the question on April 27, 2017 at 06:59

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Previous: A student investigated a property of acids M and N by reacting equal volumes of acid M and N of the same concentration with equal volumes of 2 M potassium hydroxide. The results were recorded in the table below

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