Chemical Reactions and Equations Chemical Reaction: The transformation of chemical substance into another chemical substance is known as Chemical Reaction. For example: rusting of iron‚ setting of milk into curd‚ digestion of food‚ respiration‚ etc. In chemical reaction new substance is formed which is completely different in properties from the original substance‚ so in a chemical reaction chemical change takes place. Following are the signs of chemical reaction: (a) Change of state of substance
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reagent we need to find the number of moles of acetanilide‚ and the number of moles of Bromine. Mass of Acetanilide used = 0.67g Molar mass of Acetanilide = 135.16g/mol[1] Number of moles of Acetanilide = (0.67g) / (135.16g/mol) = 0‚005 mols Volume of Bromine = 0.25ml Density of Bromine = 3.103 g/ml[2] Mass of Bromine = (0.25ml) X (3.103g/ml) = 0.78g Molar mass of Bromine = 79.9g/mol[2] Number of moles of bromine = (0.78g) / (79.9g/mol) = 0‚0097 mols Acetanilide is the limiting reagent -To find
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reaction involving the hydrocarbon C15H32 might be: Apparatus: eye protection‚ 2 test tubes‚ boiling tube‚ delivery tube‚ stopper‚ Bunsen burner‚ pipette‚ bromine water‚ lava rocks‚ air tube‚ clamp‚ paraffin oil‚ wool‚ stand‚ trough‚ water Hypothesis: We will collect the alkanes and alkenes in a test tube and when we put bromine water in‚ the water will turn from yellow to transparent in the presence of an alkene. Method: 1. Place some wool in the back of the boiler tube. Using
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Hydrocarbons Equipment Required: -4 Test tubes -Dropper - Cyclohexane (C6H12) (3ml) - Cyclohexene (C6H10) (3ml) - Toluene (CH3C6H5) (3ml) - Potassium Permanganate solution (KMnO4) .01 mol L-1 (4ml) - Sulfuric Acid (H2SO4) 2mol L-1 (2ml) - Bromine Water (Br2) (5ml) Procedure: Reaction of hydrocarbons with acidified permanganate: 1) Into three separate‚ labeled test tubes place 1 ml of cyclohexane‚ cyclohexene and toluene respectively. 2) In a separate test tube add 4 ml of 0.01mol L-1
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UNIVERSITY OF THE GAMBIA LECTURE NOTES COURSE: PRINCIPLES OF CHEMISTRY II (ORGANIC CHEMISTRY) CODE: CHM 161 2ND SEMESTER SESSION: 2012/2013 LECTURER: ANTHONY F. ADJIVON UNIT 1 INTRODUCTION Organic chemistry started as the chemistry of life‚ when that was thought to be different from the chemistry in the laboratory. Then it became the chemistry of carbon compounds‚ especially those found in coal. Now it is both. It is the chemistry of the compounds of carbon along with other elements
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b) diatomic c) neutral d) monatomic A 3. For the formula of a compound to be correct‚ the algebraic addition of the charges on the atoms or ions in the compound must add up to __. a) zero b) one c) two d) four D 4. Potassium bromide is an example of a(n) __ compound. a) molecular b) organic c) polyatomic B d) ionic 5. The only common polyatomic ion that has a positive charge is the __ ion. a) phosphate b) ammonium c) sulfate d) nitrate Chemistry 11 Exam Review
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(which will be known through parallel chemical tests). Three tests‚ nitration test‚ bromine test and basic oxidation test were conducted to fully differentiate each type of hydrocarbon from one another. Nitration tests resulted to three positive outcomes and two negative outcomes. A positive outcome in the nitration test shows that the hydrocarbon is aromatic while a negative outcome is aliphatic. In the bromine test‚ the results showed that there is one saturated aliphatic while the other is unsaturated
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The Chemistry of Lipids Experiment #8 Objective To observe the solubility of lipids in polar and nonpolar solvents and to compare saturated and unsaturated fats in their chemical reaction with bromine. The percent fat in a food will be determined by extraction of the fat and weighing it. Introduction Lipids‚ by definition‚ are natural substances that do not mix with water but dissolve in organic solvents. There are several classes of lipids‚ including: fatty acids‚ waxes‚ triacylglycerols
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I. Objectives * Be able to prepare cyclohexene from the dehydration of cyclohexanol * Understand the mechanisms of the dehydration reaction (acid-catalyzed dehydration). * Know how to use the necessary equipment for this reaction‚ such as the fractioning column. * Obtain positive results in unsaturation tests for the presence of carbon-carbon double bond (cyclohexene). II. Background Cyclohexanol‚ the reagent of this experiment‚ is used in the production of nylon
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acetic acid dropwise until full dissolution has occured. 4. In the fume hood‚ add 0.6 mL of 4.1 M bromine solution in acetic acid. 5. Cap the round bottom flask before returning to the bench. 6. For 15-20 minutes‚ stir the reaction mixture at room temperature so that the reddish-orange coloration will fade and a solid precipitate will form. 7. Return to the hood and add a few more drops of the bromine solution in the hood if all the coloration fades. 8. Once the reaction is complete‚ return to
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