your solution will crystallize all at the same time and you’ll get a huge rock that you can’t pull out of the jar. If you have too little salt‚ then you’ll wait forever for crystals to grow. Finding the right amount takes time and patience. Rock Candy Crystals Leave a Comment Crystals are formed when atoms line up in patterns and solidify. There are crystals everywhere — in the form of salt‚ sugar‚ sand‚ diamonds‚ quartz‚ and many more! To make crystals‚ you need to make a very special
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CHE 213-451 11-1-11 Title: Radical Chlorination of 1-Chlorobutane Abstract: The purpose of the lab is to form 4 different dichlorobutanes by reacting chlorine radicals with 1-chlorobutane. This is then analyzed by gas chromatography to determine the experimental abundance of each isomer. Results: 1‚1-dichlorobutane had an experimental abundance of 5.9%‚ 1‚2-dichlorobutane had an experimental abundance of 21.1%‚ 1‚3-dichlorobutane had an experimental abundance of 48.7%‚ 1‚4-dichlorobutane
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magnesium‚ to use the reagent prepared to synthesise a tertiary alcohol (triphenylmethanol) by reacting reagent and ester (methyl benzoate)‚ and the product formed is analyse by infrared spectroscopy (IR)‚ melting point‚ thin layer chromatography (TLC)‚ gas chromatography mass spectrum (GCMS) and finally Nuclear Magnetic Resonance spectroscopy. Introduction Formation of long hydrocarbon chain compound as becomes very useful in organic chemistry synthesis. In 1912‚ Victor Grignard a French chemist
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combined all three sources and represented them as the dependence of the theoretical plate height (HETP) on the mobile phase linear velocity. Originally‚ it was introduced for gas chromatography‚ but it happened that the same physical processes occurs in HPLC‚ and this equation is perfectly fit for liquid chromatography. Multiple path The velocity of mobile phase in the column may vary significantly across the column diameter‚ depending on the particle shape‚ porosity‚ and the whole bed structure
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New or Used Car Everyone loves the idea of getting a brand new sports car. Just the thought of having that candy apple red Mustang GT makes me feels the happiness of children running free in a candy store. Still as amazing as it would be to go out and buy that dream car right now‚ buying a new car is a big financial decision that can be a little hard to make. What about buying a new “used” car instead? When deciding whether or not to buy a used or new car its best to know and research the important
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GM‚ Kriz GS‚ Engel RG. (2011). A Small Scale Approach to Organic Laboratory Techniques. Location: Unknown. Publisher: Mary Finch (August 10‚ 2006). Retrieved November 13‚ 2012‚ from http://www.chem.ucla.edu/~bacher/General/30BL/gc/theory.html Chromatography. Introductory Theory. Retrieved November 13‚ 2012‚ from http://teaching.shu.ac.uk/hwb/chemistry/tutorials/chrom/chrom1.htm
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Unit 4 Review. 1. Which is not a method for collecting a toolmark on a doorframe? a. casting that portion of the doorframe b. photography b. removing that portion of the frame c. making a rubbing of the mark on the frame 2. Which tool most likely made these striations? a. pry bar b. screwdriver c. Pliers d. bolt cutter 3. Analysis of radial cracks from three impacts revealed that cracks from A stopped at cracks from Z. Cracks from Z stopped at cracks from B. Which is the correct order of the impacts
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2-butanol yielded 4.6% 1-butene‚ 67.3% trans-2-butene‚ and 28.1% cis-2-butene‚ and a dehydrohalogenation of 2-bromobutane yielded 19.1% 1-butene‚ 69.9% trans-2-butene‚ and 11.0% cis-2-butene. Backround: Gas Chromatography separates organic samples much in the same way as column chromatography. The only differences are that it uses a moving gas phase and a stationary liquid phase‚ and that the temperature of the gas system can be controlled. In a gas chromatograph the sample is shot in with a syringe
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COLUMN AND THIN LAYER CHROMATOGRAPHY Mark Paul P. Pastrana‚ Mariah Ericka M. Patawaran‚ Princess Juneire M. Peligro‚ Francisco Q. Pua III‚ Rose Anne L. Quyo and Janille P. Ragpa Group 8 2B Medical Technology Organic Chemistry Laboratory ABSTRACT The main objectives were to separate the colored components of malunggay leaves by means of column chromatography‚ as well as to determine the purity of the components using thin layer chromatography (TLC) and measure the Rf values of the colored
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1. What physical evidence did you find at the victim’s home? A box of matches‚ a space heater‚ beer bottles‚ Natalie’s wallet‚ a V-shaped burn pattern‚ burned outlet‚ a protected surface on the ground‚ crazed glass‚ and a puddle-shaped burn pattern. 2. Describe the process that you used to take a sample of the puddle-shaped burn pattern on the floor. Why did you also take samples from the portion of the floor that was not burned? First‚ I took the chisel to loosen up some of the wood chips
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