Amino Acids Glycine is the smallest of the amino acids. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. In aqueous solution at or near neutral pH‚ glycine will exist predominantly as the zwitterion. Alanine is a hydrophobic molecule. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. The α carbon of alanine is optically active; in proteins‚ only the L-isomer is found. Serine differs from alanine in that one of the methylenic
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POTATO BATTERY Abstract a. Purpose To lessen the consume of electric charge b. Procedure We insert copper and zinc electrodes in to the potato‚ close but not touching each other. We use Clip leads to connect our electrodes to the Multimeter to measure voltage between two electrodes or current passing through the multimeter. For this experiment we removed the shell of a broken AA battery for our Zinc electrode. (Make sure to test your multimeter by connecting its Positive and Negative
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burette‚ burette clamp‚ Pasteur pipette‚ reagent bottle‚ conical flask stopper‚ retord stand‚ white tile Materials: 2 ml manganese sulphate solution‚ 2 ml alkaline-iodine solution‚ 0.025M sodium thiosulphate solution‚ 2ml concentration sulphuric acid‚ starch solution Procedure 1. When sampling water‚ care must be taken to ensure that a good representative sample of the water to be analyzed is obtained. For most purposes‚ this includes attention to dissolved gases. Therefore‚ the water sample
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• The equilibrium law DYNAMIC EQUILIBRIUM forward A +8 reaction ""r=====~’~ reverse reaction Most chemical reactions do not go to completion. Once some products are formed the reverse reaction can take place to reform the reactants. In a closed system the concentrations of all the reactants and products will eventually become constant. Such a system is said to be in a state of dynamic equilibrium. The forward and reverse reactions continue to occur‚ but at equilibrium
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on biological thinking as the discovery of base-pairing in nucleic acids. These complementariness principles do not only underlie current ideas on the structure of the nucleic acids‚ but they form the foundation of all speculations‚ more or less well- founded‚ on their physical properties (denaturation‚ hypochromic- ity‚ etc.)‚ on the transfer of biological information from deoxy- ribonucleic acid to ribonucleic acid‚ and on the role of the latter in directing the synthesis of specific
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Name ______________________________________ Before you begin‚ save this Lab Report Template on your computer as LastNameAPChem7 Title: Acid Base Titration Purpose: To practice titration techniques To perform acid-base titrations To determine the molarity and percent composition of acetic acid in commercial vinegar Materials: |0.1 M sodium hydroxide |24-well reaction plate |toothpicks | |phenolphthalein test paper
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and creating something accidental‚ or just by plain dumb luck. Most of the discoveries and expansions of nitro compounds has to do with luck. One account of pure randomness is when Christian Friedrich Schöbein spilled a mixture of nitric acid and sulfuric acid on his wife’s apron. When he hung it to dry‚ he had converted the cellulose in the apron as an internal source of oxygen; when heated‚ it exploded. Phenols also had a high probability in chance. Joseph Lister covered a clothe in phenols
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CARBOXYLIC ACID Introduction: Organic compounds containing (–C(O)–OH) as a functional group are called carboxylic acids. The –C (O)-OH group which itself is made up of a carbonyl group (>C=O) and a hydroxyl group (-OH) is called a carboxyl group (carb from carbonyl and oxyl from hydroxyl group). Carboxylic acid may be an aliphatic or an aromatic depending upon whether –C–OH is attached to an alkyl group ( or a hydrogen atom) or an aryl group. Their general formulas are; ALIPHATIC CARBOXYLIC ACID: R–C
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Lauric Acid Lauric acid‚ also known as Dodecanoic Acid‚ was discovered in 1849 by Marrsson T. It was first discovered in Lauraceae seeds‚ but it is also commonly found in soaps‚ vegetable oil‚ coconut oil‚ and breast milk. Lauric Acid is a clear‚ solid compound that is insoluble in water. It also comes in the form of a white powdery substance. The chemical formula is C12H24O2. It has a molecular weight of 200.32 g/mol. Lauric Acid also has a melting point of 44 C and a boiling point of 289.9
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(CuO) and carbon dioxide gas. APPARATUS – ITEM QUANTITY/CONCENTRATION Copper carbonate 2 g Limewater (saturated Ca(OH)2 solution) 10 mL Bunsen burner Matches Test tubes 5 Retort stand‚ boss head and clamp 1 Gas delivery tube and cork stopper 1 Sulfuric acid (H2SO4) 10 mL 1 mol/L Spatula 1 Copper sulfate 3 mL Cont…. PROCEDURE i) EXPERIMENT DESIGN TABLE Variable Definition Experiment variable Independent variable The factor changed Heat Dependent variable The factor measured Substances produced Constant
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