Planning: I am investigating the effect of increasing enzyme concentration on the rate of reaction. Prelimary work is very important and I conducted this before carrying out my final experiment. It is important because I need to find out which was the best vegetable to use, the best cork borer size and how much hydrogen peroxide would be best to use. I also needed to decide whether test tubes were better then boiling tubes or vice versa. I concluded that it was best to use potatoes because it gave a larger amount of froth then...
0.5 0.5 0.7 0.9

2 1.1 1.1 1.3 1.5 1.4

3 0.7 1 1.5 2 2.1

4 0.6 1.1 1.6 1.9 2

5 1.5 1.7 1.9 2.1 2.6

Average Results

POTATO SIZE

cm HEIGHT OF FROTH cm

1st min 2nd min

cm 3rd min

cm 4th min

cm 5th min

cm

1 0.3 0.4 0.5 0.6 0.7

2 0.8 1.4 1.2 1.3 1.4

3 0.5 0.9 1.3 1.6 1.9

4 1.0 1.4 1.8 2.3 2.6

5 1.3 1.8 2.1 3.0 3.4