Catalase is an enzyme found in food such as potato and liver. It is used for removing Hydrogen Peroxide from the cells. Hydrogen Peroxide is the poisonous by-product of metabolism. Catalase speeds up the decomposition o

 Pour the hydrogen peroxide into the conical flask and immediately insert the bung, at the same time start the stopwatch.

It would have been expected that when the concentration doubled so would the rate of reaction but this didn't occur. After 270 seconds the rate of reaction slows almost to a halt. The straight lines show this on the graphs. At this point virtually all of the active sites are occupied so the active sites are said to be saturated with hydrogen peroxide. Increasing the concentration at this point will not cause the rate of reaction to go up any more. . All the active sites are being used so any extra Hydrogen Peroxide molecules will have to wait until an active site becomes available.

Some common words found in the essay are:
Average Rate, Hydrogen Peroxide, Prediction Hydrogen, Volume H2Ocm3, Enzymes Catalase, H2O2 H2O, Pestle Mortar, Concentration Experiment, hydrogen peroxide, rate reaction, conical flask, gas syringe, Product Catalase, Catalase H2O, active sites, water bath, 1 experiment, experiment 3, experiment 1 experiment, experiment 2, 74 74, experiment 2 experiment, 2 experiment 3, 1 experiment 2, experiment 3 average,
Approximate Word count = 2577
Approximate Pages = 10 (250 words per page double spaced)