ethtjyjjinvestigation of theInvestigating the Effect of the Enzyme Catalyse On Hydrogen Peroxide


The aim of this experiment is to determine the effects of varying
enzyme (catalyse) on Hydrogen Peroxide.

Hydrogen Peroxide + Catalyse à Water + Oxygen

2H2O2 à H2O + O2 + Heat

Apparatus & Diagram




Hydrogen Peroxide


Collected Oxygen

Delivery Tube

Measuring Cylinder


Using the Equipment Safely

It is important that we use the apparatus carefully, as safety will be
an issue throughout the whole experiment. We will wear goggles and an
apron or lab coat to protect our eyes and clothes. As we are using
enzymes and Hydrogen Peroxide we need to be extra careful, ensuring
they don't come into contact with our eyes, skin or clothes.

Catalyse is an enzyme found in all living cells. It makes Hydrogen
Peroxide decompose into water and Oxygen. We will be measuring the
amount of Oxygen released from the Hydrogen Peroxide. In order to do
this we will use a measuring cylinder. This piece of apparatus
measures the amount of Oxygen given off, measuring in cm3. This will
help us measure the amount of Oxygen more accurately.

To make the test fair, the following parameters must remain constant
during the experiment. These parameters must remain constant during
the experiment. These parameters are water, Hydrogen Peroxide,
Catalyse and the duration of the reactions. By insuring the test is
fair, we will gain accurate results.


Dependant Variable: Time, Size of 5cm piece of Potato

Independent Variable: Amount of Oxygen released

Control Variable: Volume of Hydrogen peroxide, size of Potato,
concentration of Hydrogen Peroxide


I predict that the breakdown of Hydrogen Peroxide will be quicker when
the surface area is increased. If you cut the same size piece of...