The Effect of pH on the Rate of Enzyme Catalysis of Catalase Objectives: The objective of this lab was to develop a protocol to investigate the effect of an environmental variable on the catalytic function of an enzyme. More specifically‚ the objective was to perform an experiment in order to test the effect of pH on the function of the enzyme catalase. Introduction: Enzymes are proteins that act as catalysts for reactions. This simply means that enzymes lower the activation energy required
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measurement methods‚ and factors influencing the efficacy of the whitening process. Keywords: Tooth colour Tooth whitening Mechanism Measurement Peroxide Aesthetics Sources: ‘‘Medline’’ and ‘‘ISI Web of Science’’ databases from 1966 and 1974‚ respectively were searched electronically with key words tooth‚ teeth‚ colo*r‚ white*‚ bleach* and peroxide. Conclusions: The importance of tooth whitening for patients and consumers has seen a dramatic increase in the number of products and procedures over
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Abstract The following experiment details the effect of different concentrations of catalase on the production of oxygen and water through the breakdown of Hydrogen Peroxide. In this experiment paper disc where coated in varying concentrations of catalase‚ 0‚ 25‚ 50 75 and 100%. The time taken for the disc to float between two markers on the side of a glass was then recorded. This experiment demonstrates that the higher the concentration of enzyme used the greater the production of oxygen on the
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Abstract The major objective of this experiment was to observe the effects of catalase under varying controlled conditions. The scope of this experiment includes Metabolic processes‚ such as cellular respiration‚ and it poisonous byproduct hydrogen peroxide. The methodology includes procedures; multiple variables were tested in specific concentrations; that test the reaction rates of the enzyme catalase over a fixed period of time. The major conclusion was that catalase reacts faster in warm temperatures
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substrate (Hydrogen Peroxide). As the hydrogen breaks down the hydrogen peroxide into hydrogen and oxygen gas‚ the bubbles of oxygen gas collect underneath the filter and make it rise to the surface of the hydrogen peroxide. The time it takes for the filter to rise is an indication of the rate of the rate of enzyme activity. Rate of enzyme activity-distance time Materials: 1. A specific weight enzyme 2. Filter papers 3. 3% Hydrogen Peroxide solution
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Effect of Substrate Concentration on Catalase Aim: An experiment to find out how the concentration of hydrogen peroxide affects the rate of reaction of the enzyme catalase. Background Information: Enzymes such as catalase are globular protein molecules with catalytic properties. A catalyst is a substrate which can alter the rate of reaction without itself undergoing any permanent change. As they are not changed
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rates without being destroyed or altered. They are able to encourage chemical reactions by decreasing the energy of activation. The main function of enzyme catalase is to convert hydrogen peroxide (H2O2) in our bodies into oxygen and water. This can be visually seen when hydrogen peroxide is put on a wound and the peroxide bubbles. Enzymes can also be found in plant cells and fungi. (Huston.) In this experiment we test the many variables that can change the rate of this reaction such as temperature
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Materials: * 3% hydrogen peroxide * Manganese dioxide * Fresh or frozen liver * Potato * Ice Equipment: * Fine clean sand * Stirring rod
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enzymatic activities I predict salt is an activator of Peroxidase because salt contains Na ions which attaches to the allosteric site changing the shape of the enzyme to fit a substrate. Materials: • Peroxidase (enzyme in potato) • Hydrogen peroxide‚ 3% • A strong acid‚ pH3 (lemon juice‚ or HCL) 0.5 • A
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Chemistry Lab Report (Design) Factors affecting Rates of a Reaction (Kinetics) KINETICS DESIGN LAB Research Question: Does the concentration of Potassium Iodide (KI) affect the rate of its reaction with hydrogen peroxide (H2O2) (of a fixed concentration)? Introduction: There are several factors that affect the rate of a reaction. Some of them being Pressure (if the reactants are Gases)‚ Temperature‚ Presence of a Catalyst‚ Surface Area of the reactant‚ and Concentration. According to
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