copper provided was a shiny brassie colour. This is because the copper provided was in form of a wire. It had undergone further processing. And my final copper sample may have picked up impurities along the way‚ which made it darker in colour. 8. Acetone is a flammable ketone. If exposed to temperatures greater than its flash point it may explode or cause flash fire. 9. The yield would be more than a 100%‚ the calculated yield would be incorrect and not a true reflection of actual yield. 10. Because
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chromatogram (only solvent) ready and you will check to make sure you left enough room below the sample line in order to make sure the sample isn’t submerged in the solvent. Under the fume hood‚ the chromatography solvent (90% petroleum ether: 10% acetone) will be added to the tube‚ approximately 2 ml is enough. The paper is then placed in the solvent‚ while making sure the sample line is above the solvent and dry. You will then cover the top of the tube with Parafilm and set it aside. At about 30
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November 15‚ 2007 Synthesis of 1-Bromobutane Introduction: The purpose of this experiment is to synthesize 1-bromobutane from 1-butanol and sodium bromide. In order for this reaction to reach completion there are four major operations that need to be performed. The four major operations include refluxing‚ simple distillation‚ separation‚ and drying. To begin‚ in order for the compounds to react they will be dissolved in water and sulfuric acid will be added. The addition of sulfuric acid will
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by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
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| | Potassium Carbonate (aq) | 138.21 | | | 2.29 | | 891 | Calcium Chloride | 110.98 | 1g | | | | 772 | 10% Silver Nitrate (aq) | 169.87 | 5 drops | | 4.35 | 444 | | Methanol | 32.04 | 1mL | | .791 | 64.7 | | Sodium Iodide in Acetone | | | | | | | Experimental Procedure: Macro/Miniscale Synthesis * 100ml round bottom flask‚ add 14g of NaBr‚ 15ml of water and 10ml of 1-butanol * Place the flask in an ice-water bath * Make the contents cold * Add 12ml of
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much of a choice. When you smoke a cigarette‚ the smoke floats around‚ being inhaled by everyone around you. There are nine main chemicals in cigarette smoke: Benzene (Petrol Additive) Formaldehyde (Embalming Fluid) Ammonia (Toilet Cleaner) Acetone (Nail Polish Remover) Tar Nicotine (Insecticide/Addictive drug) Carbon Monoxide (CO) (Car Exhaust Fumes) Arsenic (Rat Poison) Hydrogen Cyanide (Gas Chamber Poison) All of the above are highly addictive‚ and none the less‚ lethal. Those
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oxides‚ hydrogen ionides‚ and ammonia. “There are forty-three known carcinogens in main stream smoke” (cigarette ingredients). You can find some of these chemicals in your bathroom cleaner as in ammonia. Other chemicals in cigarettes contain tar‚ acetone‚ benzene‚ nicotine‚ and arsenic (rat poison). The list goes on of all the harmful chemicals that can be found in cigarettes and cigarette smoke. Second would be second hand smoke. Second hand smoke is a term used to describe cigarette smoke that
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We began our research by treating chalcone 1a (??) with acetylacetone 2a (??) in the presence of morpholine as the base (??) in CH3CN at 80 ºC for 12 h. The reaction was monitored by TLC until the disappearance of the starting material and the formation of 1-(5-benzoyl-2-methyl-4-phenyl-2‚3-dihydrofuran-3-yl)ethanone 3a. this reaction mixture‚ containing the 2‚3-dihydrofuran 3a generated in situ‚ was treated with sulfur element (??) in the presence of base of morpholine (??) at 80°C and the desired
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Therefore‚ adipose tissue is broken down by lipase forming free fatty acids (Westerberg‚ 2013). The free fatty acids are converted into acetyl coenzyme A‚ some are used in the Krebs cycle to produce energy and the rest are “broken down into ketone (acetone‚ acetoacetate‚ and B-hydroxybutyrate)” (Westerberg‚ 2013‚ p.
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chart‚ outline the process of gram staining. (5 marks) Flood the slide with crystal violet for 1 minute then rinse with water Flood the slide with iodine for 1 minute then rinse with water Flood the slide with solution of ethanol and acetone for 10 to 30 seconds then rinse with water Flood the slide with safranin for 1 minute then rinse it with water Blot dry the slide 3. What is the function of iodine when used in gram staining? (2 marks) Its function is to form large
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