reactions using physical and chemical properties and balanced chemical equations. There are four different types of chemical reactions decomposition reactions‚ single displacement reactions‚ synthesis reactions‚ and double displacement reactions. A decomposition reaction happens when a compound breaks into two or more elements or compounds. Generally‚ for decomposition reactions heat‚ energy‚ light or electricity is needed to separate the compound. In a single displacement reaction‚ a single element
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use. None of the chemicals used are classified as radiation‚ flammable or explosive hazards. Some of the chemicals however‚ are classified as toxic. There are three main components of glow sticks that are considered toxic: dibutyl phthalate‚ hydrogen peroxide and pthalic oxalate esters. Dibutyl phthalate is a colorless organic liquid that is used as a plasticizer (additives that make
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inhibitor during the catalysis of the hydrogen peroxide into O2 and H2O. Introduction: We rely on oxygen to provide us with energy (ATP) and go through all the phases of aerobic respiration. However‚ oxygen can be harmful to humans and can cause problems if not carefully regulated. Our cells can create a great range of antioxidant enzymes to fight and control the dangerous hydrogen peroxide and catalase is one of them. Catalase can convert hydrogen peroxide into
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Chemistry : 1. Aluminium hydroxide on thermal decomposition gives aluminium oxide and water 2. Iron (iii) oxide reacts with carbon forming iron and carbonmonoxide 3. Hydrogen peroxide reacts with lead sulphide forming lead sulphate and water 4. Lithium reacts with nitrogen forming lithium nitride 5. Nickel sulphate reacts with sodium phosphate to form nickel phosphate and sodium sulphate 6. Silver oxide reacts with hydrogen peroxide to form silver ‚ water and oxygen 7. Ammonia
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H+(aq) ions by titrimetric analysis. 9 F The hydrogen gas formed in the reaction between zinc and dilute hydrochloric acid CANNOT escape from a closed reaction vessel. Thus‚ the mass of the reaction mixture would NOT decrease as the reaction proceeds. 10 F It is difficult to measure the volume of water produced from the reaction between oxalate ions and permanganate ions in aqueous solution. 1 11 T During the decomposition of hydrogen peroxide solution‚ oxygen gas is formed. 2H2O2(aq) 2H2O(l)
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Our body is constantly metabolizing which creates an extreme number of hydrogen peroxide; therefore‚ if the cell environment is either too acidic or too basic‚ the action of catalase can be inhibited which can cause the hydrogen peroxide to destroy our cells. In addition to catalase‚ there are also many enzymes that are the most efficient when surrounded by a pH of 7. However‚ there are some enzymes such
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¬¬¬¬¬¬04/28/2010 Monday & Wednesday 7:40-10:30 Experiment #2 – Kinetics of the Decomposition of Hydrogen Peroxide Introduction: Chemical reactions are dependent upon two factors: temperature and concentrations of substance. We can monitor the rate at which a chemical decomposes or the rate at which a chemical substance appears. In this experiment we will be measuring the rate of decomposition of hydrogen dioxide with the following reaction: 2 H202 (aq) 4 2 H20 (l) + 02 (g) We can trap the
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that interact with the active site and they help increase the rate of reaction. Inhibitors bind and react with the side chains and slow the rate of reaction. In this experiment‚ hydrogen peroxide (H O ) acted as the substrate being broken down while 2 2 the catalase was the enzyme. The hydrogen peroxide formed a decomposition reaction as it was broken down to water (H O) and oxygen (O ). The balanced equation is evident below. 2 2
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that‚ to the 3 cm mark‚ while test tube 1 was filled with HCl‚ test tube 2 was filled with distilled water‚ and test tube 3 was filled with NaOH. Then‚ pH was immediately measured on each tube and recorded. After 5 minutes‚ each tube was added hydrogen peroxide to the 7 cm mark and swirled to mix. After 20 seconds‚ the height of the bubble column of all tubes was measured in millimeters and recorded. Results Tube 2 with the pH of 7 had the highest height of bubble column at 10 mm. However‚ the tube
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There need to be two chemicals that interact to release energy and also a fluorescent dye to accept this energy and convert it into light. Although there is more than one recipe for a lightstick‚ a common commercial lightstick uses a solution of hydrogen peroxide that is kept separate from a solution of a phenyl oxalate ester together with a fluorescent dye. The color of the fluorescent dye is what determines the resulting color of the lightstick when the chemical solutions are mixed. The basic premise
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