Experiment diagram Initial method Throughout my experiment, I will only be changing one variable for my tests, which will be the temperature of the hydrogen peroxide. This was decided because it allows the solution to react quickly enough. I will test the gas that is collected through the experiment every 30 seconds, for 5 minutes.
Thirdly, you need to measure out the 3 grams of potato that you need using the weighing scales. This gave us accurate results for the gas collected. This variable gave us plenty of results that were reliable as well as accurate.
This gives me enough data allowing me not to repeat any more of the tests. There are four different variables that I could have changed to lead to the rate of reaction being affected: This example would produce a faster reaction than a large solid, with the same mass but a larger surface area.
Next you need to manoeuvre the delivery tube under the measuring cylinder in the water bath. These two molecules will only react if they have enough energy.
First of all, you need to select a potato for you tests and extract cylinders of potato using a core borer. After you have placed the potato into the flask, you need to place the bung this is on the end of the delivery tube on the top of the flask 9.
The chemical equation for this reaction is: Start timing with the stopwatch straight away and record the ml decrease of gas every 30 seconds.
Hypothesis I predict that when the temperature of the peroxide is increased,the reaction will occur a lot quicker. You must make sure that the potato is the same weight for each experiment to make you fair, accurate and reliable. I will then repeat each test 4 times to make it fair and accurate, then giving me reliable results to evaluate later on.
Increasing the surface area will increase the chances of collisions that will take place. This enzyme is a protein which speeds up the rate of the chemical reaction, every enzymes does this. These should all roughly be the same size.
There were various amounts of variables that we could have changed for our experiment. You now need to place the pieces of potato that you just cut up into the conical flask without misplacing any of them as it may lead to inaccurate results.
Because catalysts work so rapidly and are used again and again, it is only necessary to have very small quantities of catalyst present to make a chemical reaction go faster.
Catalyst- This is a substance which alters the rate of a chemical reaction but is chemically unchanged at the end of the reaction. Everyone one participating on the experiments had to make sure their hair was tied back and any jewellery was removed.
You then have to fill the measuring cylinder with water, and then submerge it into the water bath without any of it escaping. By heating this, you will increase the energy levels of the molecules involved in the reaction. I chose to change the temperature of the hydrogen peroxide our preliminary test showed us it would be the best possible way to test the rate of reaction.
What can affect the rate of reaction? You then have to cut the potato into 9 segments, with a length if 5mm, a radius of 4mm and a diameter of 7mm so you can have complete coverage of the potato, from the hydrogen peroxide. The catalyse that we used is potato, and is the enzyme that I used in the experiment.
This will then lead to a higher volume of gas that gets produced, but if the temperature increases too much, it will cause the results to level off and then the enzyme will denature. Another variable that I could have chosen to change was the surface area of the potato or the catalyst.As you increase the temperature the rate of reaction increases.
As a rough approximation, for many reactions happening at around room temperature, the rate of reaction doubles for every 10°C rise in temperature. I chose to change the temperature of the hydrogen peroxide our preliminary test showed us it would be the best possible way to test the rate of reaction.
I shall be investigating how temperature affects the rate of reaction Rates of reaction The Factors that affect the rate of reaction are temperature, surface area, Essay about How.
* Guiding Question: How does the change in temperature affect the rate of reaction? * Objectives: The objective of this experiment is to see how temperature affects reaction rates. * Hypothesis: We think that temperature increases the rate of reaction because the increase in temperature increases the energy of the particles and therefore overcomes.
The Effect of Temperature on the Rate of Reaction Words | 6 Pages. The Effect of Temperature on the Rate of Reaction Aim-We is going to investigate how temperature effects the rate of reaction when we use a Magnesium Ribbon and dissolve it in Hydrochloric Acid.
If it were an endothermic reaction, the temperature would lower, because the reaction is using up more energy breaking the bonds, this is noted and a temperature change, this time, showing how temperature decreases. The acid and alkali compounds dissolve into water, acid into hydrogen ions, and alkali in hydroxide ions.
The Effect of Temperature on the Rate of Reaction Essay Words | 5 Pages The effect of temperature on rates of reaction Aim: The aim of this experiment is to find out if the reaction rate of sodium thiosulphate solution and hydrochloric acid will be affected by a temperature change.Download