Chemical Catalyst Investigation Purpose To design and conduct an investigation into how the concentration of hydrogen peroxide in a solution with distilled water will affect the rate of the catalyzed reaction between the hydrogen peroxide solution and manganese oxide. Manganese chemical catalyst and its reaction with different concentrations of hydrogen peroxide. Liquid hydrogen peroxide decomposes according to the equation: 2H202 (l) 2H20 (l) + 02 (g) Therefore, to measure the rate of reactions we will measure the amount of oxygen emitted by the reaction.-------- - ------------------------------------------------- - -------Method======Variables:· Temperature· Concentration of hydrogen peroxide· Surface area of the catalyst· Mass of the catalyst· Type of catalystThe variable chosen is:· Concentration of hydrogen peroxide. To make the test fair, I will keep the temperature the same in each test. I will have the temperature at room temperature. This will keep the test correct as the reactions differ with temperature, when there is a higher temperature the particles gain more energy and are able to move faster therefore creating more reactions whereas when there is a lower temperature the particles they don't have as much energy and therefore don't create as many reactions. So, by maintaining the same temperature throughout the investigation, the particles in each test will have the same amount of energy, making the test correct. I will also keep the mass of the catalyst the same in each test, 0.1 g. By adding catalyst to a reaction, the rate of the reaction increases. With the addition of a small amount of catalyst the rate of the reaction increases but not as much as when a large amount of catalyst is added. Therefore, by keeping the mass of the catalyst the same in each experiment, the test will be correct. In each test I will also keep the volume of the solution, the same, 40 ml. This will ensure that the percentage of hydrogen peroxide and distilled water will be different in each
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