Experiment 11 Calorimetry and Hess’s Law Purpose- To determine the change in enthalpy for four reactions using calorimetry and Hess’s Law Procedures: A. Calibration of the Calorimeter 1. Obtain two copper cylinders and a Styrofoam cup with lid from your lab instructor. Check out a digital thermometer display from the storeroom window. 2. Set up a hot water bath using a 600mL beaker‚ ring stand‚ and Bunsen burner. Weigh the two copper cylinders
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...............___________________________________ b) CH 3COOH(aq) ..........................................___________________________________ c) CCl4(l) ...................................................___________________________________ d) HNO3(aq) e) C2H6(l) 2. ................................................___________________________________ ......................................................___________________________________ A good way to test a liquid to see if it contains ions
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RESULTS AND DISCUSSION Oxidation-Reduction reaction also known as redox reaction is a process in which there’s a net movement of electrons between reacting species. These types of reactions involve two separate elementary reactions: one that loses electrons and another that gains the electrons that was lost. Gaining of electrons is referred to as Reduction reaction (the species that undergoes reduction is called as oxidizing agent) while losing of electrons is called Oxidation reaction (the reducing
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part of a metabolic pathway involved in the chemical conversion of carbohydrates‚ fats and proteins into carbon dioxide and water to generate a form of usable energy. Other relevant reactions in the pathway include those in glycolysis and pyruvate oxidation before the citric acid cycle‚ and oxidative phosphorylation after it. In addition‚ it provides precursors for many compounds including some amino acids and is therefore functional even in cells performing fermentation. |Contents
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This paper is the first to indicate antiemetic activity of the methanolic extract compositions of A. julibrissin flowers and its protective effect on mitochondria disruption induced by retching in brain of the young chickens. Nausea and vomiting are the symptoms of drug side effects‚ different disease and defenses responsive against poisoning. Recently‚ extensive researches have led to use of medicinal plants as a safe and reliable source of drugs with low or lack of toxicity and side effects [22
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The metabolic response to prolonged starvation Early stage of prolonged starvation Starvation occurs when the body has a severe lack of nutrients needed to survive. The body has ways of adapting to periods without food‚ for example overnight it needs to survive without any additional nutrients whilst asleep. The body however also has ways of adapting for as long as long as 5-6 weeks (Garber‚ 1974). Therefore‚ looking at the metabolic state during starvation is over a long time period. The body
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disinfectant. 5.1 Potassium Permanganate Chemistry 5.1.1 Oxidation Potential Potassium permanganate is highly reactive under conditions found in the water industry. It will oxidize a wide variety of inorganic and organic substances. Potassium permanganate (Mn 7+) is reduced to manganese dioxide (MnO2) (Mn 4+) which precipitates out of solution (Hazen and Sawyer‚ 1992). All reactions are exothermic. Under acidic conditions the oxidation half-reactions are (CRC‚ 1990): MnO4- + 4H+ + 3e- à MnO2 +
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Rey Vincent P. Antonio Experiment 8: Quantitative Determination of Copper Concentration in Aqueous Solution by Iodometric Titration Results and Discussion Oxidation-reduction titration is a kind of volumetric analysis where the titrant used undergoes a redox reaction with the analyte. In this experiment‚ the oxidation of iodide (I-) to produce iodine (I2) is taken into consideration. The use of this concept in a redox titration is called iodometry. Iodimetry‚ on the other hand‚ deals with the
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equation: A(absorbance)=log(100/%T) and plot on a graph. The y-axis should be labeled A and the –axis should be labeled Concn for the concentration of molarity. Draw the best fit line through the graph. Place a penny in a beaker and carefully add HNO3 and occasionally swirl so that the penny can completely dissolve. Once the penny is fully dissolved‚ fill another test tube with the newly created copper (II) nitrate and again‚ test for the %Titration and convert it to the A. Plot it on the graph
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Experiment 8: Synthesis of Adipic Acid Performed November 8th & 10th By Jennifer Seitz Organic Chemistry 344 Section 803 Fall 2011 Objective: The purpose of this experiment was to synthesize adipic acid from cyclohexanol via an oxidation reaction that was catalyzed by sulfuric acid. Purity of the product was assessed by measuring the melting point. Physical Properties/Structures: Name | Formula | Molecular Weight (g/mol) | Boiling Point (0C) | Melting Point(0C) | Density(g/mL)
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