I was the meanest‚ richest and smartest boy in my Primary Four class. Being a notorious bully‚ students cowered at the mere mention of my name. Without any reason‚ I would start bullying other students. I always had a bag of tricks up my sleeves‚ so my ‘attack’ on my ‘victim’ would come unexpectedly. I always had a sense of satisfaction after successfully bullying a student. It was like another feather in my cap. Others’ misery was my happiness. On one typical Monday recess‚ I caught sight of
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The next two questions refer to the diagrams below representing an organelle from a cell. Question3: The organelle in the diagram is: a) The nucleus of a cell b) A Mitochondria c) Part of the cell membrane d) A golgi body Question 4: The function of this organelle is to: a) Control the metabolism of the cell b) Modify proteins by adding a glycoprotein c) Synthesis proteins d) Package molecules into vesicles before secreting them from
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SUMMARY The aim is to observe distillation process of ethanol-water solution and to measure the alcohol content after process in this experiment. 500 ml of solution with an alcohol content of 32% (v/v) is used for this experiment. Temperature values are recorded for every 10 ml alcohol obtained in the flask. The process is repeated in our experiment and for the first process‚ the data collection process continues until the distillate reaches to 200 ml. The concentration of alcohol is measured for
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Bacterial Fermentation Secondary article Article Contents Volker Mu¨ller‚ Ludwig-Maximilians-Universita¨t Mu¨nchen‚ Munich‚ Germany . Introduction Under anaerobic conditions‚ in the dark and in the absence of electron acceptors‚ organic compounds are catabolized by strictly anaerobic or facultatively anaerobic bacteria by internally balanced oxidation–reduction reactions‚ a process called fermentation. In fermentation‚ the organic compound serves as both electron donor and acceptor‚ and adenosine
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important that you accurately weigh your sample of acid and titrate to a phenolphthalein (colorless to pink color) end point using an accurately known dilute solution of sodium hydroxide (0.1000 M). If your unknown is soluble in a greater than 50% ethanol/water mixture‚ then use bromothymol blue as the indicator to give a yellow to blue color change. Using an analytical balance‚ accurately weigh out approximately 0.2 g of your unknown acid (measured to 0.001g) and dissolve in 50 – 100mL of water.
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Period 1 Group 8 Mrs. Chan Topic: Chemical Explosions Due Date: 9/30/16 For this experiment‚ a few scientists are researching the changes in gas pressure and launch velocity needed to send a film canister across the room using the ignition of ethanol. The independent variable would be the different types of flammable sprays. The dependent variable would be how far the explosions are sent across the room. The constant would be way the device is built for every type of spray‚ and the control would
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of this experiment was to synthesize dibenzalacetone via an aldol condensation reaction between acetone and benzaldehyde. This was done by mixing the two reactants with NaOH and ethanol‚ then allowing the reaction to sit for thirty minutes. The crystals were then washed with water three times and recrystallized using ethanol. It was then characterized using melting point analysis. The percent yield for this reaction was 59.84%. This was due to loss of crystals during recrystallization and during solvent
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Benzoic acid Benzoic acid + NH3 - red litmus paper turned blue Benzoic acid + NH3+ FeCl3 - orange precipitate/ flesh-colored precipitate formed Formation of Esters a. From Carboxylic acids Acetic acid + ethanol + H2SO4 - produced a sweet smell b. From Acyl Halides Ethanol + H2O + H2SO4 - produced a sweet smell Hydroxamic acid test for the Ester group Ethyl acetate in ether + NH2OH.HCl + KOH heat effervescence + alcoholic HCl + FeCl3 – red colored solution Hydrolysis
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In this experiment Methyl salicylates are prepared along with ethyl and 2-propyl salicylates in which the reaction proceeds with salicylic acid as the starting material along with the other reactants such as methanol‚ ethanol and 2-propanol. More specifically‚ sulfuric acid is employed as the suitable acid catalyst. FIGURE 2: Formation of methyl salicylate from salicylic acid. 2. CALCULATION: PERCENTAGE
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Additives Lab Purpose The purpose of this lab is to test what effect of Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ and Ethanol on an organism’s heart rate. Materials * Microscope * Eye dropper * Pipet * Cotton balls * Depression slide * Beakers * Daphnia * Water * Five additives: Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ Ethanol Procedure 1. Put on safety goggles. 2. Catch a living Daphnia. 3. Transfer to a depression slide and add water
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