PRE LAB REPORT Reynaldo Riboul TLC and Column Chromatography October 6‚ 2013 Table of Chemicals: Chemical Hazards Mol. Wt. Density Grams Moles Acetone Flammable‚ Irritant 58.08 g mol−1 0.791 g cm−3 2.0 g 0.0344 Hexane Flammable‚ Irritant‚ Dangerous to Environment 86.18 g mol−1 .6548 g mL−1 9.0 g 0.1044 Fluorene Very toxic to aquatic life with long lasting effects 166.223 g/mol 1.202 g/mL 0.3 g 0.00180 Fluorenone Irritant 180.20 g mol−1 1.13 g/cm3 0.3 g 0.00166
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Review Questions Complete questions # 1 - #4 1. The equilibrium would shift towards the right and the color of the solution would be orange. 2. The equilibrium would shift to the left. More acetate ion has been added to the equilibrium already containing this ion
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Assignments in Science Class X (Term II) 4 Carbon and its Compounds IMPORTANT NOTES 9. Unsaturated organic compounds : Organic compounds in which a double or a triple bond exists between two carbon atoms in a carbon chain‚ are called unsaturated organic compounds. 10. Hydrocarbons : Organic compounds which contain only carbon and hydrogen atoms are called hydrocarbons. 11. Straight chain hydrocarbons : Hydrocarbons‚ in which all the carbon atoms are linked to one another in a straight chain
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Sodium borohydride Reduction of Benzil Introduction: The Purpose of this experiment is for the students to learn how to use sodium borohydride to reduce benzil to its secondary alcohol product via reduction reaction. This two-step reaction reduces aldehydes by hydrides to primary alcohols‚ and ketones to secondary alcohols. In order for the reaction to occur and to better control the stereochemistry and yield of the product‚ the metal hydride nucleophile of the reducing agents such as LiH‚ LiAlH4
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Match and Water in a Glass Science Magic Trick Fun Trick with Fire and Water This is a simple and interesting science magic trick involving fire and water. All you need is water‚ a glass‚ a plate‚ and a couple of matches. Pour water into a plate‚ light a match in the center of the dish and cover it with a glass. The water will be drawn into the glass. Match and Water Trick Materials • plate • water • 2 wooden matches • a quarter or other large coin • colored water
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TITLE: Determination of Riboflavin by using UV-Vis spectrophotometry. ABSTRACT: The amount of Riboflavin in various brand of children multivitamins was determine by using UV-Vis spectroscopy instrument‚ the series of standard of riboflavin was prepared in order to determine the amount of the riboflavin in the sample of children multivitamins. The maximum amount of riboflavin was found in the Champs multivitamin that contains 0.1155 mg followed by Chewies 0.1131 mg and Scott’s 0.0672 mg. OBJECTIVES:
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Diary Recount - Received design brief and folio assignment for breadbox. - Received long piece of timber for 12 slats and cut each to 350mm long. - Jackplaned dozen slats to10mm thick and chamfered each to 3mm. - Marked rebate joints on top and cut with electric router and jig. - Marked curve on both sides of breadbox with pencil and template. - Nailed sides together with 40mm bullet-head nails and Warrington hammer followed line with jigsaw - Sanded sides evenly with disc sander. Finished
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Clostridium Difficile People getting medical care can catch serious infections called healthcare-associated infections or HAI’s. One type of HAI which is caused by the germ Clostridium Difficile or C-Diff. In 2015 it was estimated almost half a million infections in the United Ststes‚ and 29‚000 died within 30 days of the initial diagnosis. Those most at risk are older adults‚ who take antibiotics and also get medical care. The CDC provides guidelines and tools for the healthcare population to help
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It is clear that salt‚ also known as sodium chloride‚ should no longer be used on our roads in the winter months. The first two reasons why salt needs to stop being used are because salt negatively affects aquatic ecosystems and causes damage to vegetation. The third reason is because thankfully‚ there are alternatives that we can use‚ that would be benefiting us which we should use instead of sodium chloride. To begin with‚ sodium chloride is detrimental to our aquatic ecosystems when it is
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must regulate is water; water is everywhere in our body and its balance is essential for proper body function. A very carefully regulated process is solute concentration. If there is a sudden increase in water which enters the extracellular fluid‚ sodium ions will then contribute less to the extracellular solute concentration as the ratio between water and solute has now changed. Osmolality is the amount of solute in a kilogram‚ hence the osmolality in the extracellular space has also decreased.
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