Reaction of Catalase with Hydrogen Peroxide
Reaction of catalase with hydrogen peroxide
AIM: I aim to find the rate of reaction between catalase and hydrogen peroxide.
Enzymes such as Catalase are protein molecules that are found in living cells. They are used to speed up specific reactions in the cells. Each enzyme just performs one particular reaction so they are all very specific. Catalase enzymes found in living cells e.g. in yeast, potato or liver, speed up (in our case) the breaking down of hydrogen peroxide.
The lock and key analogy…
The lock is the enzyme and its active sight is where you put the key in. The key is like the substrate that comes and bonds to the active site or the key that fits into the lock.
[pic]
The collision theory
The collision theory explains rates of reaction in terms of the motion of particles in the reactants. For a reaction to happen the reactant particles must collide. Only a certain amount of the total collisions cause chemical change; these are called successful collisions. The successful collisions have enough energy at the moment of impact to break the existing bonds and form new bonds, therefore leading to the products of the reaction
-Temperature. At a higher temperature, reactant particles are moving faster with greater average kinetic energy. Therefore more of them collide with enough energy to cause a successful reaction.
-Concentration. At a higher concentration, there is a greater chance of reactant particles colliding with each other with enough energy to cause a successful reaction. Rate of reaction is directly proportional which means if you double the concentration it will double the rate of reaction.
-Surface area. Smaller particles, e.g. in powders have a much greater surface area than lumps or crystals. With a greater surface area, more collisions can take place. Rate of reaction therefore doubles if the surface area of the reactant particles double.
Hypothesis
I predict that as the substrate concentration of hydrogen peroxide increases the rate of
AIM: I aim to find the rate of reaction between catalase and hydrogen peroxide.
Enzymes such as Catalase are protein molecules that are found in living cells. They are used to speed up specific reactions in the cells. Each enzyme just performs one particular reaction so they are all very specific. Catalase enzymes found in living cells e.g. in yeast, potato or liver, speed up (in our case) the breaking down of hydrogen peroxide.
The lock and key analogy…
The lock is the enzyme and its active sight is where you put the key in. The key is like the substrate that comes and bonds to the active site or the key that fits into the lock.
[pic]
The collision theory
The collision theory explains rates of reaction in terms of the motion of particles in the reactants. For a reaction to happen the reactant particles must collide. Only a certain amount of the total collisions cause chemical change; these are called successful collisions. The successful collisions have enough energy at the moment of impact to break the existing bonds and form new bonds, therefore leading to the products of the reaction
-Temperature. At a higher temperature, reactant particles are moving faster with greater average kinetic energy. Therefore more of them collide with enough energy to cause a successful reaction.
-Concentration. At a higher concentration, there is a greater chance of reactant particles colliding with each other with enough energy to cause a successful reaction. Rate of reaction is directly proportional which means if you double the concentration it will double the rate of reaction.
-Surface area. Smaller particles, e.g. in powders have a much greater surface area than lumps or crystals. With a greater surface area, more collisions can take place. Rate of reaction therefore doubles if the surface area of the reactant particles double.
Hypothesis
I predict that as the substrate concentration of hydrogen peroxide increases the rate of