Studying the rate of reaction of the catalyst decomposition of hydrogen peroxide.

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Studying the rate of reaction of the catalyst decomposition of hydrogen peroxide.

AIM:        The aim of this experiment is to find out if the concentration of the hydrogen peroxide affects the rate of reaction between hydrogen peroxide and the manganese dioxide (catalyst).

VARIABLES: There will be several variables in this experiment. A variable is something that will affect the outcome of an experiment. The first being the volume of the hydrogen peroxide which will 20ml. The next variable is surface are of the catalyst, the most accurate way of trying to make the surface area very similar was weighing each amount, the reason why we could not check the surface area was because there were hundreds of small grains. The next variable was the temp; this was room temperature which will be about 21 degrees. The next variable was the mass of catalyst which was 0.1 grams.

FAIR TEST: To make sure this was a fair test I had to make sure that all the variables were kept the same for each experiment, apart from the concentration of the hydrogen peroxide. All the experiments will be set up the same way each time to make sure that the results are as accurate as possible. We will also make sure that the stop clock is as accurate as possible by staring the stopwatch as soon as the solution is dropped in the conical flask.

APPARATUS: In this experiment the following items will be used. A burette this will be used to see how much gas is given off to record how quick the reaction takes to complete. A conical flask will be where the reaction is taking place. A lab jack will be used to make sure that the conical flask will be able to be level wit the burette so no gas leaks. A clamp stand will be used to support the burette so that it so it not fall down. We will use a bung to make sure that no gas escapes from the conical flask. We will use scales so that we can weigh the amount of catalyst used in each of the experiment. We will use hydrogen peroxide for the reaction to take place as well as the manganese dioxide.

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SAFETY:        In this experiment there were not many safety procedures that I had to follow. But because we were using chemicals we had to make sure that any spillages were reported to the teachers and also if there were any breakages of glass. We also were goggles in case of any spillages so that no solution would go into our eyes. We also had to follow all the laboratory rules and make sure that any obstructions on the floor would be cleared a way such as bags. Whilst doing this experiment I would also have to know where the ...

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