It’s A Gas! Name____________________________ Pd. _______ Purpose: The purpose of this lab is to look at some properties of three common compounds‚ CO2‚ H2‚ O2. Materials: Zinc Hydrochloric acid Hydrogen peroxide Manganese dioxide Calcium Carbonate (marble chips) Safety:The Hydrochloric acid used in this experiment could cause blindness upon contact with the eyes. Wear your goggles and handle it with care. Procedure: I. Place approximately
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all living things) its specific use is to speed up the decomposition of Hydrogen peroxide (H2O2) within cells. Hydrogen peroxide is a bi-product of chemical processes such as respiration and is harmful if not removed or broken down into less harmful molecules. The enzyme (Catalase) acts as a catalyst‚ vastly accelerating this chemical reaction and allowing cells to function at a level where they can support life. Catalase Hydrogen-peroxide Water + Oxygen 2H2O2 2H2O + O2
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outcome of enzyme activity Introduction In this project I will monitor the rate of activity of Catalase. Catalase is an Enzyme which in the right conditions catalyses the decomposition of Hydrogen Peroxide into water and oxygen; 2H2O2 + Catalase >>> 2H2O + O2 Catalase is found in all cells and protects them from Hydrogen Peroxide which is a dangerous waste product that needs to be eliminated. Without Catalase living things could not survive. What are Enzymes? Enzymes are found in the cells of
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this lab students measured the height of the foam after catalysis between catalase (enzyme) and 7 other (solutions) to determine which solution had the fastest reaction rate.. The control variable of the experiment would be the solution of only hydrogen peroxide‚ water‚ and catalase. The independent variables of the experiment were the abiotic factors such as PH level‚ temperature‚ and the amount of salt within the environment. The dependent variable of the experiment would be the height of the foam(product)
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sticks work. But what are the chemicals compounds that react chemically in a light stick. In a typical commercial light stick there is a mixture of hydrogen peroxide solution and a solution containing a phenyl oxalate ester and a fluorescent dye. Here’s the sequence of events when the two solutions are combined: 1. The hydrogen peroxide oxidizes the phenyl oxalate ester‚ resulting in a chemical called phenol and an unstable peroxyacid ester. 2. The unstable peroxyacid ester decomposes
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warm (around 70°C) Part 3. Effect of Concentration 1M HCl‚ 5 mL per group 3M HCl‚ 5 mL per group 6M HCl‚ 5 mL per group 3 pieces of zinc metal‚ each approx 1 cm × 1 cm 3 test tubes Part 4. Effect of a Catalyst 3% hydrogen peroxide‚ H2O2 – 10 mL per group 0.1 M iron(III) nitrate‚ Fe(NO3)3 0.1 M sodium chloride‚ NaCl 0.1 M calcium chloride‚ CaCl2 0.1 M potassium nitrate‚ KNO3 0.1 M manganese chloride‚ MnCl2 100-mL graduated cylinder 10-mL graduated cylinder 7 test tubes
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Affecting the Rate of Enzyme Activity Justin Hunter G. Kim September 16‚ 2011 September 26‚ 2011 Abstract Catalase is a common enzyme found in nearly all living organisms that is frequently used by cells to rapidly catalyze the decomposition of hydrogen peroxide into less reactive oxygen and water molecules. Catalase is a protein that is most commonly found in the liver. The purpose of this experiment was to determine the effect that changes in temperature and pH have on the function of the
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+ O2-----> 2MgO | 2. Bubbling and fizzing occurs; the zinc appears to “dissolve” and what appears to be “steam” comes off out of container. | single-displacement reaction | Zn + 2 HCl (aq) --> ZnCl2(aq) + H2(g) | 3. Black smoke occurs | decomposition reactions | 2 (H2O2)(aq) MnO2 2 (H2O) + (O2) | 4. reddish-brown deposit on the surface of iron; surface of the iron is found corroded; the blue solution turns light green | single-displacement reaction | Fe + CuSO4(aq) --> FeSO4
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Toothpaste. Materials This demonstration requires chemicals that are not available to the public. Chemistry teachers and science demonstrators are specially trained in the hazards of using these chemicals. * Hydrogen peroxide (30%) - This is ten times stronger than the normal hydrogen peroxide you can find at the store * Sodium iodide solution‚ 2 M or * Potassium iodide solution‚ 2 M * Liquid soap * Food coloring * Graduated cylinder (500 mL) * Safety glasses * Rubber
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investigation‚ I will be using the enzyme catalase‚ which is found in most living organisms. It catalyses the decomposition of hydrogen peroxide into water and oxygen. 2H2O2 + Catalase > 2H2O + O2 Catalase dramatically reduces the activation energy needed for the reaction. Without catalase the decomposition would take much longer‚ and would not be fast enough to sustain human life. Hydrogen peroxide is also a dangerous‚ very potent by-product of metabolism‚ so it is essential that it is broken down quickly
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