GCSE / O Levels Chemistry

In four separate experiments, 1, 2, 3 and 4, nitric acid was added to excess marble chips and the
volume of carbon dioxide formed was measured.
In all four experiments the same volume of nitric acid was used.
Its concentration, or temperature, or both concentration and temperature, were changed.
The results of the experiments are shown on the graph.
200
1
volume of CO,
produced
/ cm3
3
100-
4
1
2
3
4
7
time/min
Which statement is correct?
A A lower concentration of acid was used in experiment 3 than in experiment 1.
B Experiment 4 was faster than experiment 3.
C The acid used in experiment 2 was of a lower concentration than in experiment 1.
D The temperature of the acid was the same in experiments 1 and 2.


Rate of Reaction | 2017 - M/J - 5070/12 | Q16