1a2 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.
a) i)
Complete the box to show the apparatus labelled.
[1]
ii)
Indicate on the diagram, with an arrow, where heat is applied.
[1]
1b1 mark
b)
What should be used to transfer the copper from a bottle to the apparatus?
[1]
1c1 mark
c)
The copper changed colour from brown to ..............................
[1]
1d2 marks
d)
Why was the apparatus left to cool before measuring the final volume of gas?
[2]
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