Chemistry‚ University of Santo Tomas‚ Manila‚ Philippines Abstract: The purpose of this experiment was to synthesize isoamyl acetate via an esterification reaction between acetic acid and isoamyl alcohol‚ using concentrated sulfuric acid as a catalyst. The product was washed with sodium hydrogen carbonate‚ as well as with water‚ and then dried with anhydrous sodium sulfate. The percent yield of isoamyl acetate was 52.79%. The product was isolated using a combination of techniques – acid-base
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RATE OF REACTIONS. The reaction rate (rate of reaction) or speed of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place. For example‚ the oxidative rusting of iron under the atmosphere is a slow reaction that can take many years‚ but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second (right). Chemical kinetics is the part of physical chemistry that studies reaction rates. The concepts
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Ester also contributes the flavor and aromas in fruits and flowers. The esterification reactions will use in the procedure‚ which are the interaction of a carboxylic acid with an alcohol‚ aided by an inorganic acid catalyst (H2SO4). Moreover‚ the green method will not use any catalyst but using heating source instead (microwave). Based on the comparison of two methods‚ green chemistry is the effective method because reduce the consumption energy and less time consuming than the non-green chemistry
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Purpose and Background The purpose of this lab is to explain how enzymes act as catalysts for biological reactions in different temperatures. This lab relates to enzymes‚ proteins‚ and substrates; that we learned in class. The union of the enzyme and the substrate is called the enzyme-substrate complex. The make-up of an enzyme is proteins and made up of chains and amino acids. Enzymes are considered to be organic catalysts‚ they speed up chemical reactions that might otherwise take too long to occur
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which became Earth’s plants Significance : There are many inexplicable and mystical elements in the myth. The events which involve spiritual or magical circumstances often have the most important consequences: each of the events above is a major catalyst or plot event. -These events show the importance of the mystical in Onondaga life and their belief that there is something beyond the physical which humans cannot control. 8. Summary and Overall Significance The myth’s stated purpose was to explain
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Ashley Esparza Stallings Period 2 January 26‚ 2013 Enzyme Catalysis Lab Report Background: Enzymes are catalyst‚ which affect the rate of a chemical reaction. One consequence includes the cell to carry out complex chemical activities at relatively low temperatures. In these reactions the substrate binds reversibly to the active site. The cause of this is a decrease in the energy needed to activate the reaction of the substrate molecule to from products. Every enzyme is particular for a
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vaporization". Chem. Phys. Lett. 243: 49–54. Collins‚ Philip G.‚ (2000). "Nanotubes for Electronics". Scientific American: p 67–69. Eftekhari. A.‚ Jafarkhani P.‚ Moztarzadeh F.‚ (2006). "High-yield synthesis of carbon nanotubes using a water-soluble catalyst support in catalytic chemical vapor deposition". Carbon 44 (7): 1343. Guo‚ G. Y.‚ Jayanthi‚ Lei‚ Liu‚ Wu S. Y.‚ (2002). "Colossal Paramagnetic Moments in Metallic Carbon Nanotori". Physical Review Letters 88 (21): 217206 Hong‚ Myung S.‚ Seunghun
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by Mary Jo Anthony I. Introduction II. Materials and Methods III. Results IV. Conclusion and Discussion Introduction Background Information: This lab allowed us to study chemical reactions and how catalysts will affect the rate of these reactions. The reaction we studied is the breakdown of hydrogen peroxide to water and oxygen and it is vital to life. The molecule hydrogen peroxide is a molecule that is toxic to cells but is also a by product of various
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Factors Affecting Rates of Chemical Reactions Prepared By: Kelly Gunter For: Ms. Brohman Course: SCH-4U Introduction The main purpose of this lab was to investigate how temperature‚ concentration‚ the addition of catalysts‚ and the substitution of a more reactive reactant‚ can affect the reaction. The collision theory explains that in order for a reaction to occur‚ reacting particles must collide with one another. An effective collision makes reactants result in a reaction and
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washed with cold water (2 x 1.0mL) then let dry to yield aspirin (0.1732‚ 63%) as solid form. Mp. 133-136 oC (lit[2] 134-136 oC). Discussion: The reaction of synthesis of aspirin with salicylic acid an acetic anhydride with phosphoric acid as catalyst formed acetylsalicylic acid in 63% yield as crystalline solid. The melting point of the crystals was determined to be 133-136 oC‚ which is within the reported literature range and supports the identity of the desired reaction product. The narrow
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