Date: April 23‚ 2012 Subject: Preparation of Synthetic Banana oil Summary: Banana Oil is a major flavoring in many different mixtures from candles to different types of food. The major organic chemical that is banana oil is ester‚ which is what gives it its strong odor. In this scenario‚ the banana oil supply is running low for Cavendish Distilling Company. So they want to formulate a synthetic version of banana oil to replenish their supply. Problem: Will the synthetic version of banana oil
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Metallic zinc is reduced C. Copper ion is oxidized D. Sulfate ion in the reducing agent 10. In which set are the substances arranged in order of decreasing solubility in water? A. Al(OH)2 > Mg(OH)2 > NaOH B. BaSO4 > CaSO4 > MgSO4 C. CaCO3 > NaHCO3 >Na2CO3 D. AgCl > AgBr > AgI 11. What Volume of 10M HCl solution is required to prepare exactly 500 mL of a 0.60M HCl solution? A. 10mL B. 14mL C. 30mL D. 40mL 12. What is the molarity of a solution made by dissolving 9.56g of sodium acetate(82.03g/mol)
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Chapter 10 - Cumulative Review (94)Identify at least one chemical change and two physical changes that are occurring in the photo. (Chapter 2) (95)Classify each of the following as a physical change or a chemical change. (Chapter 2) a. an aspirin tablet is crushed to a powder b. a red rose turns brown c. grape juice turns to wine d. fingernail polish remover evaporates e. a bean seed sprouts f. a piece of copper is beaten into a thin sheet (96)Which of these statements are true about
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Flammable Table 6.2Physical Constant: Melting Point Parameter Experimental Theoretical (From Literature) Melting Point (oC) Trial 1 Trial 2 Average 88 88 86 86 Table 6.3Solubility Test Sample Solubility Solubility Class Water Ether 5% NaOH5% Na2CO3 5% HClConc. H2SO4 Unknown Sample + + + + + + Basic Compound Table 6.4Qualitative Tests for Elements Qualitative Tests Sample Treatment Observations Inference Test for Carbon Unknown Liquid Sample CuO + Lime Water White precipitate formation with
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Restoring Balance LeChâtelier’s Principle and Equilibrium Introduction Chemical equilibrium is a true balancing act. What happens when the balance is disturbed? The purpose of this lab is to observe the effects of concentration and temperature on equilibrium and to visualize how balance can be restored based on LeChâtelier’s Principle. Background Not all chemical reactions proceed to completion‚ that is‚ to give 100% yield of products. In fact‚ most chemical reactions are reversible
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Allow the dish to cool in a desiccator because anhydrous sodium carbonate absorbs moisture to form the monohydrate. Weigh‚ then heat again for five minutes‚ cool and reweigh. Repeat this process until the mass is constant. Na2CO3 + 2HCl 2NaCl + H2O + CO2 Relative molecular mass of anhydrous sodium carbonate is 106. Mass of sodium carbonate for 250cm3 0.05 M solution is 0.25 x 0.05 x 106 = 1.325g Weigh a clean‚ dry weighing bottle and weigh our exactly 1.325g
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neutralize the base? Answer(H2PO4- (aq) + OH- (aq) HPO4-2 (aq) + H2O (l) ) Question= Neutralization reactions typically occur between a strong acid and a strong base to produce a salt and water question When sodium carbonate (Na2CO3) dissolves in water‚ it partially ionizes. The carbonate (CO3-) ion takes up a hydrogen ion and forms HCO3-. What type of substance is sodium carbonate? Answer (weak base Questio Which of the following correctly describes the corrosive nature
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for both teas by at least 40 ˚c. This indicates the impurity of the caffeine extracted with its tannins. Tannins are what give the caffeine its color‚ and when it is not isolated from the caffeine it creates a soluble salt in water when mixed with Na2CO3. The reason the melting point would be broader is because tannins decompose above temperatures of 200 ˚c‚ thus making the melting point higher. The results were obtained‚ the final mass of the caffeine for the black tea was 91.6 mg‚
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When analysing the graph‚ you can see that there is a relation between the rate of reaction and the surface area. The larger the surface are‚ the faster the rate of reaction seems to be. However‚ although the grain with the largest surface area (the smallest grain) reached the highest point within the shortest amount of time‚ its end result was still lower then the medium sized grain. The explanation for this result is relatively easy. The rate of a chemical reaction can be increased by increasing
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seashells and eggshells that gives them their strength and hardness. Because calcium carbonate is a base‚ it will react with acids to form a salt and water. The complete reaction of calcium carbonate with hydrochloric acid is: CaCO3 (s) + HCl (aq) ( CaCl2 (aq) + CO2 (g) + H2O (l) The portion of the shell that is not calcium carbonate does not react with acid and remains as a solid. In this experiment you will perform the above reaction with both white and brown eggshells to determine if there is a
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