An investigation to show the effects of changing the concentration of hydrogen peroxide on the rate of catalyst

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An investigation to show the effect of changing the concentration of hydrogen peroxide on the reaction rate of catalyst.

Title of investigation

An investigation to show how the concentration of substrate affects the reactivity of hydrogen peroxide.

Theory behind experiment

The theory behind the experiment is to evaluate how our human bodies react with enzymes. They can be found in food products such as apple, yeast, liver. We used these products in our first preliminary experiment to see which ones would be most reliable for our further investigation.

Prediction

I predict that the results of this experiment will show that the higher the concentration of the hydrogen peroxide, the more gas will be produced from the reaction. This is because at higher concentration there are more molecules in the hydrogen peroxide, and there being more molecules in the substance means that the molecules are much more likely to collide. So the higher the concentration of the hydrogen peroxide the more gas will be given off, 20% concentration of hydrogen peroxide will give off the most gas and 5% concentration of hydrogen peroxide will give off the least gas is what I predict.

An investigation to show the effect of changing the concentration of hydrogen peroxide on the reaction rate of catalyst.

Aim

The aim of my investigation is to find out if changing the concentration of substrate will affect the rate (speed) of an enzyme controlled reaction. In this investigation the enzyme is called catalyse, and it breaks down the substrate hydrogen peroxide (H202) to produce oxygen.

Variables 

Temperature; too hot speeds up enzymes and won’t work, or too cold and one may die, and too much substrate the enzymes will be too crowded and busy. Concentration of substrate; we are changing the amount of hydrogen peroxide.

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I am going to change the concentration of the hydrogen peroxide that is mixed with the yeast. I will be using 5% 10%, 15% & 20% concentration of hydrogen peroxide. I will not change the amount of hydrogen peroxide that is used because that will change the concentration levels of the solutions and will make it an unfair test. Increasing the amount of hydrogen peroxide would make the experiment very difficult to measure, and would make the results much less accurate and precise. This is the same for the amount of yeast used in the experiment. The amount of yeast ...

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*** This account is only of average standard because not enough correct or specific scientific terminology is used.