Hydrogen peroxide Essays

catalytic decomposition of hydrogen peroxide Research question: How will varying the concentration of hydrogen peroxide affect the rate of reaction measured by collecting the amount of oxygen produced figure 1 shows how catalyst provide alternate pathways Background: For my internal assessment I will be investigating the catalytic decomposition of hydrogen peroxide using manganese(IV)oxide( MnO2 ) as a catalyst. I will be testing how varying concentrations of hydrogen peroxide will affect its decomposition

the effects of Hydrogen Peroxide coming into contact with a catalase solution, in this experiment it was Calf Liver. As a result of the contact, oxygen gas was formed. Therefore, the collected data suggested the rate of reaction of the catalyse increases as the volume of Hydrogen Peroxide increases. This can be seen through the linear trend line that moves up in a positive direction, which shows that the relationship between the rate of reaction and the volume of hydrogen peroxide is positive. However

The purpose of this experiment was to analyze the rate of the catalyzed decomposition of hydrogen peroxide in regard to the effects of concentration and temperature. 2H2O2 (l) —I-—> 2H2O (l) + O2 (g) In part one of the experiment, catalyst KI was added to varying solutions of 3% hydrogen peroxide and DI water and the composition of hydrogen peroxide was observed. This was observed by collection the volume of oxygen gas produced during the decomposition, and measuring its volume. From that, volume

The purpose of this experiment was to determine how the rate of the catalyzed decomposition of hydrogen peroxide is affected by concentration and temperature. In Part 1, the volume of oxygen gas was measured to determine the rate law of hydrogen peroxide. The volume of oxygen gas was measured because it is a physical property that is more easily observable, making the reaction easier to record and calculate. The reaction is second order, this can be determined because the sum of the exponents is

Does Hydrogen Peroxide Whiten Teeth Hydrogen Peroxide recently has captured the spot as it becomes one of the commonly used methods for teeth whitening either through the dentists, or through using it as a whitening agent in many of the commercial whitening products. So, what is hydrogen peroxide? How it can be used for whitening the teeth? And is it good for your teeth? What is Hydrogen Peroxide And How Does It Works? Hydrogen Peroxide can be described as an oxidizing agent that is formed through

Temperature on Hydrogen Peroxide Solution in Water Khalid Al Sabeeh Ms. Dobrin 11-G Chemistry HL Jan 5, 2015 Abstract: Within this lab yeast was added to hydrogen peroxide solution in water. Temperature was the factor to be tested. In all trials, the initial and final, when yeast was added temperatures increased by 10˚C respectfully per trial. This is because hydrogen peroxide is unstable and when decomposed it increases the thermal temperature. Introduction: Hydrogen peroxide (H202) is an often-unstable

Lucas Wang 1. Title: Amount of Elephant Toothpaste Created With Different Amounts of Hydrogen Peroxide. Important: H.P. = Hydrogen Peroxide; P.I. = Potassium Iodide 2. Introduction - The Question: How does adding more or less hydrogen peroxide to potassium iodide and dish soap affect the amount of foam produced? The world of chemical reactions is none less than an absolutely fascinating one. There are many experiments or tests you can perform to explore this intriguing topic. A chemical reaction

like hydrogen peroxide which is a byproduct in many cellular reactions. In this lab, we will use a catalase solution from yeast and determine the effect of substrate concentration on the action of this enzyme. The substrate of the enzyme will be different concentrations of hydrogen peroxide (H2O2). Catalase works by the following mechanism : 2 H2O2 ------------------> 2 H2O+ O2 Hypothesis: The hypothesis for this experiment is that the foam of O2 produced from the reaction between hydrogen peroxide

The data received in the experiment only somewhat supported my hypothesis. My group tested how changing the pH of the hydrogen peroxide substrate would affect enzyme activity and the rate of reaction. Our hypothesis was that the solution with a pH closest to the pH of hydrogen peroxide, which is fairly acidic, would have the fastest rate of reaction. After conducting the experiment, we found that an acidic pH of 2 resulted in the reaction having a reaction rate of 0 sec-, while when conducted with

pertained to the enzyme known as catalase, which converts hydrogen peroxide into oxygen. Due to peroxide being toxic to the tissues of both plants and animals, both possess the enzyme catalase, which breaks into two non-toxic compounds: water and oxygen gas. Enzymes are proteins that react to certain substrates to create a product, and continue doing so afterwards. Methods and Materials To test reactions between catalase and hydrogen peroxide, groups of three to four people were formed. A scale of

In this multi-step experiment, there were multiple hypotheses which were stated. The first hypothesis was that if an enzyme catalase is added to Hydrogen Peroxide, then the temperature of the H2O2 will increase. The other two pertained to an enzyme being affected. If boiled catalase is mixed with Hydrogen Peroxide, then there will be a larger temperature jump than if only pure catalase was added. The third hypothesis was if catalase with acid is added to H2O2, then the temperature will have a smaller

the reaction will be faster The more heated the liver is the longer it will take the reaction to take place than if the liver is cold or at room temperature, MATERIALS 8 test tubes Safety goggles Test tube rack Water Ice Bunsen burner Liver Hydrogen Peroxide (H2O2) Hydrochloric acid (HCL) Sodium Hydroxide (NaOH) Liver(cut into small pieces) Test tube holder 2 beakers Pipette Stirring rods Paper Towels Beaker stand Method Gather all the material and put on the safety goggles. Place a 1 piece of

The experiment was to test the if the efficiency of the enzyme catalase was affected by the temperature of its surroundings, by putting hydrogen peroxide on chicken liver (which has the enzyme catalase) in different temperatures. The results of the experiment showed that in a cool environment (about 20℃), the reaction with catalase and hydrogen peroxide produced about 10 ml of water, a moderate amount of bubbles (compared to the other 2 samples), and released 3℃ of heat the first trial and 1℃ of

variable that is changed and controlled specifically to test the effect of the independent variable on the dependent variable is the temperature of the hydrogen peroxide and the liver, which affects the froth volume, which is the dependent variable. Constant variables in this experiment was the size of the liver, the amount of hydrogen peroxide and the time the volume was measured. The size of the liver could increase the

the enzyme. These include, but are not limited to different pH levels, changes in temperature, amount of inhibitor, and amount of salt. In the reaction done in the experiment, the enzyme is known as peroxidase and the substrate is known as hydrogen peroxide (H2O2). In every reaction, there are constants such as the buffer

Peroxidase is a catabolic enzyme originating from the turnip, used to break down hydrogen peroxide into oxygen and water. Different concentrations of peroxidase were tested with guaiacol, an oxygen indicator, to determine how the enzyme’s activity would be affected. Peroxidase, guaiacol, hydrogen peroxide, and distilled water were mixed together in test tubes and the color changes of the solution, showing the amount of oxygen produced, were recorded. The higher concentration of peroxidase had

After this optimum is exceeded, the reaction rate sharply decreases to 1 mL/minute during pH 10 and 12. This reduction of activity can be explained through the act of denaturing. This occurs when the enzyme’s tertiary structure collapses, as the hydrogen bonds that form the protein begin to break apart. The function of proteins is heavily reliant on its structure, and once it deforms, it becomes ineffective. In this particular scenario, the active of the enzyme will alter and its once complementary

Abstract In this experiment it was examined whether the enzyme peroxidase will work fastest in a pH of 8.0. We placed the enzyme peroxidase in a reaction with guaiacol and hydrogen peroxide in four different pH solutions. Then recorded the absorbencies for each reaction until all substrates were used up, and calculated the initial reaction velocities for each. We found that the reaction in a pH 7.0 solution had the highest initial reaction velocity. Over-all this study shows that the enzyme peroxidase

within a given environment. Hydrogen peroxide was introduced and given a set amount of time to react. The volume of hydrogen peroxide was measured to five milliliters before being introduced into the reaction to better find reaction rates. An enzyme acts as a catalysis to increase the rate of chemical reactions. The activation energy required is lowered by the use of an enzyme. Substrate is used as a reactant with the enzymes. In this lab, the substrate was hydrogen peroxide. They also play a role

produced per unit time). In order to do so, enzymes bind temporarily to one or more reactants, lowering the amount of activation energy needed and thus speed up the reaction. Most of the cells use an enzyme called catalase to reduce the amount of hydrogen peroxide, a toxic substance that could accumulate as a result of normal cell activity. The purpose of this experiment was to observe the effects that enzyme concentration and copper (II) sulphate would have on the rate of reaction. This experiment was