A student investigated the rate of the reaction between magnesium and dilute hydrochloric acid.
The student used the apparatus shown in Figure 1 to collect the gas produced.
Figure 1
Gas syringe
50
100
cm3
- Dilute hydrochloric acid
Magnesium
(a) Outline a plan to investigate how the rate of this reaction changed when the concentration
of the hydrochloric acid was changed.
Describe how you would do the investigation and the measurements you would
make.
Describe how you would make it a fair test.
You do not need to write about safety precautions.