• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6

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

Extracts from this document...

Introduction

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. ...read more.

Middle

We will then put the hydrogen peroxide in the conical flask and as quickly as possible we will put the bung on the conical flask. 6. As soon as the hydrogen peroxide has been put in the conical flask then we will start the stop clock. When 30 cm3 has been displaced then we will stop the clock. 7. Once the experiment has finished we will record the time it took on to a table, and from that we will be able to work the average time. Prediction: Using scientific knowledge I can predict several things. The first being that I believe in 0% concentration nothing will happen because the is no hydrogen peroxide to react with, therefore the hydrogen peroxide will not be able to displace the catalyst. Because I think this I am able to predict that the fastest reaction will be with 100%, I can back this up with scientific knowledge by saying that because it is a higher concentration then, there will be less molecules for the catalyst to react with causing the reaction to take place quicker because there will be more collisions. ...read more.

Conclusion

This is what I said in my prediction. This is because more concentrated solutions of Hydrogen peroxide have more hydrogen peroxide molecules. Because there are more molecules, more collisions occur between these and the catalyst, manganese oxide. This produces more reactions than in a lower concentration in a certain amount of time. A collision is just that, because of kinetic energy, molecules move around in liquids and gases. As the molecules move they collide. Evaluation: I think that my experiment went very well. There were no anomalies, and there were no accidents whilst the experiment was being carried out. Like in most experiment there were several things we could have improved on. The first being the most obvious, by the time the bung has been put on the conical flask the reaction will of already started this would of meant that our recordings were not entirely accurate. But I don not know of any ideas to solving this problem. I also think that the measuring devices could be improved because the scales were not very accurate. The other in accurate part of the experiment knew when the reaction had displaced 30cm3 of air because it was difficult to read off the burette. ASHWIN BHOOBUN DENSON 10E ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related GCSE Patterns of Behaviour essays

I was taking her out to the most fancy and expensive restaurant around and I'd booked a table for two on the balcony. I couldn't wait to see her. It was 6 and I'd told her to be ready by 8.

2. ## The Effect of Catalase in the Breakdown of Hydrogen Peroxide

as the concentration of catalase is increased, the volume of oxygen produced also increased, hence; a faster rate of reaction. Evaluation: The results for the unpeeled potato displays a faster rate in which the catalase was most effective. This means that the unpeeled potato allowed more enzyme-substrate complex's to be formed, thus; a faster rate of reaction.

1. ## The effect of changing the concentration of the Enzyme catalyst on the Rate of ...

However if there is a very high pH then the enzyme may become irreversible. If the amount/ volume of an enzyme is high then it will increase the rate of reaction. This is because if there is a greater surface area of an enzyme then there are more molecules exposed and available for collisions.

2. ## Investigation into the effect of increasing the concentration of hydrogen peroxide on the decomposition ...

each experiment so the Surface Area will be the same In each experiment 0.2g of MnO is used are 20%, 40%, 60%, 80% and 100%. In the experiment I am going to change the concentration of the hydrogen peroxide to see how it affects the formation of oxygen.

1. ## Factors Affecting the Rate of Catalytic Decomposition of Hydrogen Peroxide.

Volume of H202 As volume of the H2O2 increases, the total number of H2O2 particles also increases. The frequency of collisions between the H2O2 particles and the catalyst (Mn02 particles) therefore increases, as there are more H2O2 particles for the catalyst to collide with, and there will initially be more reactants for the catalyst to adsorb onto.

2. ## Investigation into the decomposition of hydrogen peroxide.

catalase enzymes), the more oxygen will be produced and the reaction will be quicker as a result of this. This is because, the larger the amount of catalase enzymes the more overall amount of particles to decompose and to break into the hydrogen peroxide.

1. ## To find out what factors affect the decomposition of Hydrogen Peroxide.

increases the speed of the reaction because there will be more space covered by the Manganese Dioxide resulting in more of the Manganese Dioxide reacting with the Hydrogen peroxide hence increasing the speed of the reaction. And a smaller surface area will have a slower reaction rate compared to a larger surface area.

2. ## Investigating the factors that affect the rate of hydrogen peroxide.

changing pH is also difficult as it is very difficult to measure pH to a high degree of accuracy, changing it is even more difficult. Whereas changing the enzyme concentration by controlling the number of potato cells exposed to the hydrogen peroxide is much easier.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to