In my coursework I will investigate about enzymes in potatoes reacting with Hydrogen Peroxide. In particular I will investigate the effects of changing the surface area of a potato when added to Hydrogen Peroxide. This is because, when increasing the surface area of the potatoes it will increase the rate of reaction because there will be more surface area on which particles from the potato and the Hydrogen Peroxide will collide on, and with more surface area there would be more particles carrying kinetic energy, and by carrying more kinetic energy the chance of the reaction to reach its activation energy is more higher and therefore creates more successful collisions and by making more successful collisions the speed of the reaction is increased.
Prediction: Therefore I predict that the crushed potatoes would produce 4.5cm3 of bubbles under the time of 3 minutes, which will be quicker than the not crushed potatoes because increasing the surface area of the potato would increase the rate of reaction and therefore increase the amount of oxygen being produced in the form of bubbles, which will fill up the test tube in the crushed potatoes more quicker.
In my experiment Hydrogen Peroxide is being used as a reactant with the potato, with an unstable structure the Hydrogen Peroxide will be changed after the reaction with a substance called catalyse which can break it down into oxygen and water which is a more sustainable, as shown:
Hydrogen peroxide Water + oxygen
2H2O2 2H2O + O2
And with oxygen being produced in the form of bubbles, I can then read off the amount of oxygen being produced during the reaction through the height of the froth.
Enzymes such as catalyse are protein molecules, which are found in living cells of potatoes. They are used to...