• 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

# To Investigate One Factor That Will Affect the Rate of Decomposition of Hydrogen Peroxide.

Extracts from this document...

Introduction

INVESTIGATION OF THE Aim: to investigate one factor that will affect the rate of decomposition of hydrogen peroxide. The equation for this reaction is;~ Hydrogen peroxide -----------------------> oxygen + water 2H O -----------------------> O + 2H O Rate of reaction means the time in which the reaction takes place. Key factors that may affect this reaction are temperature, pressure, surface area, light, concentration, type of catalyst or amount of catalyst. The factor that I will investigate, will be the amount of catalyst. Prediction: I predict that when the catalyst (Maganese IV Oxide) is added to the hydrogen peroxide, small bubbles of oxygen will appear in seconds. They will then collect in the gas syringe, therefore making it expand. If I were to double the amount of catalyst then the rate of reaction would also double as a result. Hypothesis: The theory behind my prediction is that the catalyst decomposes the hydrogen peroxide at a faster rate than if the catalyst was not added at all. ...read more.

Middle

Next I will measure 5cm of hydrogen peroxide, using the pipette I will squeeze it into the measuring cylinder. Making sure that the cylinder is flat on the lab bench to ensure that the readings are precise. I will then measure x amount of catalyst on the balance. I will then take the bung from the beaker, pour in the hydrogen peroxide and add the catalyst. Immediately I will replace the bung and start the stop clock. I will then record the reading of oxygen in the syringe every 15 seconds, until the reaction has stopped. In between these readings I will twist the syringe gently to prevent sticking. I will use these different amounts of catalyst; 0.1g 0.2g 0.3g 0.4g 0.5g I will also rinse the beaker out after each experiment, and make sure that it is completely dry, before the next experiment. I will repeat each experiment twice. Risk assessment: It is important that I wear goggles throughout each experiment as a safety precaution, so that I do get any chemicals into my eyes. ...read more.

Conclusion

This would have also probably prevented any anomalous results that I gained. As they were not I have considered that there may have been a change in temperature which could have distorted my results. To improve my method could measure the room temperature a make sure that it remained the same throughout the experiment. Otherwise I would consider my method as being accurate and quite a sound method to use again if necessary. This is the only change I would make to my method. I feel that my results are a good source to prove my hypothesis as the reaction of the hydrogen peroxide does speed up due to the catalyst. I feel that they could be made more reliable if I have controlled the environment further by keeping the temperature the same. Another experiment that I could do to back up my conclusions would be to measure the volume of gas by collection over water. I would do this with a measuring cylinder (to collect the oxygen), a trough filled with water, an airtight beaker and a delivery tube to connect the two. See Diagram below............ ?? ?? ?? ?? Elisabeth Padberg 10BR Elisabeth Padberg 10BR Elisabeth Padberg 10BR ...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

1. ## Investigation of the effect of the concentration of hydrogen peroxide on the rate of ...

This can easily be shown on a diagram like below. As you can see if there are more collisions there is more gas evolved in a short amount of time, as the time in which it takes certain particles to collide is quicker.

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

Time taken (s) 50+ 12.9 Inference: either there is too much catalyst, too large volume or too high concentration as it took too little time to collect over 50cm3 of gas. Concentration: 10 VOL Volume: 10cm3 Catalyst: 1g Volume of gas collected (cm3)

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

my graph I can see that the whole experiment went very well and that there were no anomalies. I was also able to spot a trend, which was the higher the concentration the quicker the reaction will happen. This was what I predicted in my prediction.

2. ## Magnesium Oxide

How we could improve our accuracy for this is by taking more records of other formulas and their gradients. * Unstable balance - This would have an impact on my results accuracy and reliability because the balance kept on changing due to vibration from tables being hit and by wobbling

I shouted after her and she slowed her pace. *Louise* Danny Jones is shouting for me. What do I do? What do I do? Deciding it would be rude to ignore him I turned round and gave him a puzzled look. "Erm, do you happen to know where reception is?"

2. ## Investigation of a Factor Affecting the Rate of Hydrogen Peroxide Decomposition

* Watch glass * Electronic balance * 50mL measuring cylinder * 100mL measuring cylinder * Bucket * Thermometer * Spatula * Water * Retort stand * Clamp * Boss head * Stopwatch Method: 1. Put on all precautionary safety gear.

1. ## The purpose of this investigation is to find out the different factors which, affects ...

In a solution of higher concentration, particles are closer together; therefore they have a greater chance of colliding. The more collisions the reaction rate is greater. For example, in a solution of an acid and marble chips and when they collide. The acid particles are randomly moving in the water.

2. ## To investigate one factor that will affect the rate of decomposition of hydrogen peroxide.

The reaction is at its fastest at the start, when the concentration of hydrogen peroxide in solution is high before any has been used up. The graph gradually flattens out. This is because, as the hydrogen peroxide is used up, its concentration falls.

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