A + B AB
A student conducted an experiment to study the effects of temperature on this chemical reaction. The student's
experimental conditions are shown below.
Trial Number
2 3 4
Temperature 17 18°C 20°C 16°C
Amount of catalyst 1 mg 2 mg 3 mg 4 mg
Amount of A
5g 5g 5g bg
Amount of B
7g 7g 7g 7g
Time for reaction 10 8 5 3
to complete (min)
Which of the following would improve the student's experimental design?
Keep all tubes at 18°C
Keep the reaction time constant
Use the same amount of catalyst in all trials
Decrease the quantity of reactants