1a
2 marks
A student investigated the reaction of air with copper. 100cm3 of air was passed continuously over heated copper using the apparatus below. When the volume remained constant, the apparatus was left to cool and the volume of gas was measured.
i) Complete the box to show the apparatus labelled.
[1]
ii) Indicate on the diagram, with an arrow, where heat is applied.
[1]
1b
1 mark
What should be used to transfer the copper from a bottle to the apparatus?
[1]
1c
1 mark
The copper changed colour from brown to ..............................
[1]
1d
2 marks
Why was the apparatus left to cool before measuring the final volume of gas?
[2]
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