fastest. How does salt melts ice? Salt melts ice by lowering the freezing point of the water around the ice. The ice melts and is unable to re-freeze except at a much lower temperature. Adding minerals‚ like salt‚ to ice can increase the rate of melting by disrupting the balance of the molecule. It is hard for salt to be absorbed by ice‚ but easy by water. Salt‚ on the other hand‚ combines with the ice (water) to produce a solution with a lower freezing point. This would melt the ice without sunlight
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Today‚ pot is only legalized in four states including Alaska‚ Colorado‚ Oregon‚ and Washington‚ but why does it face so much resistance? While the drug has faced opposition in our country for decades‚ today it has a lot of medical and recreational support in which it serves as an effective medicine and has other positive potential. In this article I will explain how legalizing pot could better the economy and result in a lot of constructive influence. Drug arrests would decrease and prisons would
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Crucible and Cambodia. “… and I will come to you I the black of some terrible night and I will bring a pointy reckoning that will shudder you.” There‚ she inflicts fear on the girls and gains the power to control the through that fear. In Cambodia Pol Pot inflicted fear among the people of Cambodia which allowed him to overthrow the government and gain power.” You will confess yourself or you will hang… I say you will hang if you do not open with me!”Again when afflicted with fear the people are like
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out by Actual yield of synthesised aspirin: 0.347g 0.347/1.196 * 100= 29 Percentage yield: 29% Melting Points Compound Began Melting (°C) Totally Melted (°C) Range (°C) Pure Aspirin 136 1-2 Crude Aspirin 125 130 5 Product from Willow Bark 120 125 5 The documented melting point for pure aspirin is 136°C. An impure compound will exhibit a lower melting point than this‚ which is what was observed in both the willow bark product and the crude aspirin. Pure aspirin has
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Preparation of Dibenzalacetone by the Aldol condensation David o Neill Date of experiment: 14/12/2011 Apparatus Steam bath‚ ice bath‚ Buchner funnel‚ beaker‚ conical flask‚ filter paper‚ TLC apparatus‚ Melting point apparatus Materials / chemicals Benzaldehyde‚ acetone‚ ethanolic sodium hydroxide‚ ethanol Introduction The synthesis of dibenzalacetone is formed from an Aldol condensation reaction. An Aldol condensation reaction is a very effective way of forming a carbon – carbon bond reaction‚ in
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10-12 % by volume of the fat‚ a nitrogencylinder With flowmeter is connected to suction of feed pump 40 3-5 Crystallization System ( Refrigeration Load : 1T/ HR-50 TR) Average Composition of a General purpose Bakery Fat : High Melting Point Middle Melting Point Lower Melting Point Til Oil (Sesame) 43-44ºC 35-36ºC 28-30ºC 50% 35% 12% 3% 100% Equipment Fat Temp ºC RPM Residence In Out Time Seconds Performer I 47+2 34+2 400-500 20 Performer II 34+2 24+1 400-500 20 Maturator I 24+1 28+1 175-200 90-180
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drug. The identity of the drug was determined through melting point‚ percent recover‚ and Rf values. The comparable data for acetaminophen from the manufacturer is 500mg of active ingredient. After conducting the experiment-extraction‚ distillation‚ and evaporation- 451mg of active ingredient. This relates to a 68.1% recovery. The melting point was between 158 and 165 degrees Celsius‚ which is almost ten degrees lower than the published melting point of acetaminophen. After conducting a TLC plate
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After the Khmer Rouge takes over the city of Phnom Penh in 1975‚ the Ung family struggles to stay together. Days go by without food and rest‚ making it hard to stay strong while traveling. Over the course of several years‚ the family becomes separated and several members die‚ leaving Loung Ung to question the concept of her family. From Loung’s perspective in her memoir‚ “First They Killed My Father”‚ her family is vital although they are forced to separate and start new lives. However‚ after all
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your claim). -The Salicylic acid that I obtained had a melting point range around 157-158 degrees Celsius for Part A. For Part B the melting point range was 156-157.5 degree Celsius. Part B‚ I would say the sample is less pure because of the notion that impurities lower the melting point. Since part A ‘s melting point was higher and closer to the melting point of the pure sample‚ it was more pure. The pure Salicylic acid that I got the melting point for had a range from 158-159 degrees Celsius. The
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recrystallized to form a solid‚ clear‚ crystal- like product. The melting was taken from the recrystallized product to determine what had been obtained. The melting point was found to be 130.5°C-133.7°C. Concluding that the product formed from the addition of bromine was a mixture of the erythro-2‚ 3-dibromo-3-phenylpropanoic acid‚ which has a known melting point of 204°C‚ and threo-2‚3-dibromo-3-phenylpropanoic acid‚ which has a known melting point of 95°C. Meaning the recrystallized product was a racemic
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