PRACTICAL III: THE BEHAVIOUR OF AMINO ACIDS IN SOLUTION Abstract In this practical the acid-base behaviour of amino acids was assessed. Amino acids are amphoteric. They have the basic (amine) and the acidic (carboxylic) functional groups. These show the same type of equilibrium reactions that all weak acids and bases undergo‚ and the relative amount of each can be altered by adjusting the pH of the solution. For this practical glycine was used as a model to show this unique nature of
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I am going to compare and contrast animals surviving in the wild and a human surviving.Because some things for animals might be easier for them to do‚ but not humans.In this article I willl be using a lot of refernces from “Call of the wild” and “Hatchet” to show some light on the topic. First off‚there are some things that an animal and man share when it comes to surviving.One would be water‚ without this no living thing can obviously survive.And satying hydrated in the wild espically is crucial
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Isopentyl Acetate Synthesis Results: Crude % Yield Calculation Reaction: H2SO4 C2H4O2(aq) + C5H12O(aq) ----> C7H14O2(aq) + H2O(l) (1 mole of acetic acid reacts with 1 mole of isopentyl alcohol to make 1 mole of isopentyl acetate and 1 mold of water) Volume of isopentyl alcohol (d=0.809g/mL; MW=88.15g/mol): 2.5mL Moles of isopentyl alcohol: (2.5mL)(0.809g/1mL)(1mol/88.15g) = 0.02294mol Volume of glacial acetic acid (d=1.06g/mL; MW=60g/mol): 3.5mL Moles of glacial
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The youth no longer aspire to become hard workers or employees‚ but search for jobs that have very high income. For example‚ “British children no longer aspire to be train drivers or nurses – more than a fifth say they just want to be rich”(Monbiot‚ ch2 p126) . Loneliness increases the risk of death at a younger age. It also has great effects on individuals sleep and well-being. The mortality rate of the society increases dramatically‚ leaving negative side effects such as the stagnation of the economy
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electrons in the n=2 level orbitals. b) The σ2p is the highest filled level. c) The B.O. is 2. d) The molecule is diamagnetic. e) There are no unpaired electrons. 7. Which probably has the highest boiling point at 1 atm pressure? a) (CH3)2CHNH2 b) (CH3)3N c) CH3CH2NHCH3 d) CH3CH2CH2NH2 e) H2NCH2CH2NH2 8. Which of the following ionic compounds should have the highest melting point? a) LiBr b) MgO c) NaI d) CaS e) NaCl 9. Given the bond enthalpies N-H (389)‚ Cl-Cl (243)‚ N-Cl
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Environmental Chemistry It often matters how much given atoms combine‚ in what arrangement‚ with what others‚ what impulse they receive‚ and what impart. The same ones make up earth‚ sky‚ sea‚ and streams; the same as the sun‚ the animals‚ grains and trees‚ but mingling and moving in every different ways. - Lucretius (95-52 B.C.) in The Nature of Things I. Physical Chemistry Why is Physical Chemistry important in the study of Environmental Engineering? • Applied physical chemistry procedures
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SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 2 CHEMISTRY JC2 Preliminary Examination Paper 1 Multiple Choice Additional Materials: Data Booklet Optical Mark Sheet (OMS) 9647/01 23 August 2011 1 hour READ THESE INSTRUCTIONS FIRST On the separate multiple choice OMS given‚ write your name‚ FIN/NRIC and class in the spaces provided. Shade correctly your class and FIN/NRIC number. Eg. If your NRIC is S9306660Z‚ shade S9306660Z for the item “index number”. There
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Objective: The purpose of this experiment was to prepare the Grignard reagent methylmagnesium iodide and react it with benzoin to form the 3o alcohol 1‚2-diphenyl-1‚2-propanediol‚ through an addition reaction pathway. Introduction: Grignard reagents are alkyl or aryl-magnesium halides that act as the nucleophile in Grignard reactions‚ where ketones are reacted with the reagent‚ then treated with acid to produce an alcohol. In the case of this experiment‚ methylmagnesium iodide was created
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A Chemistry Project Report on Study of Quantity of Casein Present in Various Samples of Milk Submitted by: Student of XII-Science (Chemistry) Vikram Jeet Mallick Submitted to : Lecturer in Chemistry Sr. Sec. School Certificate This is certified that the chemistry project report entitled "A project on the study of quantity of casein in different samples of milk" submitted for partial fulfillment of XII Sc. Practical examination in the subject of Chemistry
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fall apart and forms back into a liquid.(A common example of a STF is equal proportions of cornstarch and water). The shear thickening fluid used in liquid body armor is made of silicon dioxide (SiO2) particles suspended in polyethylene oxide (H−[O−CH2−CH2]n−OH). Silicon dioxide is found in sand and quartz‚ and polyethylene oxide is a polymer commonly used in laxatives and lubricants. When the body armour is being made‚ the STF is diluted in ethanol‚ then kevlar is saturated with the liquid and it is
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