Edward Dickson CHE101 DS-01 Experiment Date 7/21/2013 Report Submitted 7/21/2013 Title: Experiment #8: Ionic Reactions Purpose: In this lab we will work with aqueous solutions of ionic substances and determine if they are soluble. If the solution appears milky than it is known as a precipitate reaction‚ meaning it is soluble‚ and that the ions separated and became surrounded by water. Precipitates in this experiment are electrically uncharged. To identify which compounds are
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Have you ever bothered to read patient information leaflets before taking medicine? That is the leaflet that often comes with a pack or box of medicine telling you everything you need to know about the medication. A recent report revealed that lack of clarity and trust affected patient’s attitude to information in prescription leaflets. According to the report‚ the patients sometimes see the information as ‘’scary’’ or ‘’confusing.’’ This has raised concerns about the quality of patient information
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he called them triads. In 1817‚ Dobereiner noticed that the atomic weight of strontium‚ Sr‚ was halfway between the weights of calcium and barium‚ which these elements possess similar chemical properties. He also noticed the same pattern for the alkali metal triad (Li/Na/K) and the halogen triad (Cl/Br/I). In 1829 Dobereiner proposed the Law of Triads which Middle element in the triad had atomic weight that was the average of the other two elements. Later‚ other scientists found other triads
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Tollen’s Reagent ( Ammonia cal silver nitrates). CH3–CHO+ [O] CH3COOH 3. From alkyl nitriles: Compounds having a cyanide ( –CN) group are called nitriles. Hydrolysis of an alkyl nitrile on boiling with mineral acid or alkalis yield corresponding carboxylic acid . R–CN +H2O RCOOH +NH3 CH3–CN + 2H2O+HCL CH3COOH + NH4CL 4. BY OXIDATIVE CLEAVAGE OF ALKENES: Alkenes when heated with alkaline KMNO4 are cleaved at double
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The equipment needed when making standard solutions includes; a volumetric flask‚ a glass beaker‚ two plastic weighing boats‚ scales‚ a spatula‚ and the sodium hydroxide. When using glassware in experiments‚ it must be flushed out to make sure that cross contamination does not happen and that the only thing that would then be coating the beaker is the distilled water. When all of the glassware has been cleaned‚ some sodium hydroxide should be placed in a plastic weighing boat next to the scales
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called irritant contact dermatitis. This condition arises from working with substances that physically damage the skin when they came into contact with it. Among the chemicals that can cause this type of damage are many in common use such as acids and alkalis and organic solvents can dissolve the skin’s protective layer of oils‚ leaving it dry‚ cracked and vulnerable. Some strong irritants can cause immediate damage‚ resulting in serious skin burns. Many weaker substances may require days of contact before
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Background Research Scanning Tunneling Microscope; or STM‚ allows scientists to image or display crystalline material surfaces down to an atomic level. Basically; it shows the formation of surface atoms on conducting and semi-conducting materials such as metals‚ or metalloids. First invented by Gerd Binnig and Heinrich Rohrer in 1981; the Scanning Tunneling Microscope used quantum tunneling to extract atomically resolved images to understand the morphology of crystalline surfaces including both
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Rebekah May Taylor - 20086758 The Role of Nutrition in Health and Diet-related Diseases Contents 1. Metabolic Processes 3 1.1. Anabolism 3 1.2. Catabolism 4 1.3. Digestion and Absorption 6 1.4. Amino Acid Interconversion 1.5. Respiration 8 1.5.1. Glycolysis 8 1.5.2. Link Reaction 9 1.5.3. Krebs Cycle 9 1.5.4. Electron Transport Chain 10 1.5.5. Anaerobic Respiration 10 2
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Phenolic yellowing issues We have been facing yellowing on the fabrics kept at stores‚all the test results were passing like PH‚Phenolic yellowing‚Formaldehyde‚Light and BGF but we couldn;t come to an solution .Hence we have finally kept the fabric exposed in sunlight for a day and found that it has totally became yellow in the exposed area.So please advise whether the fabric stored can be wrapped with a opaque cover and also in the dark room to avoid the issue. 1 month ago * Close viewer
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“[Dry cleaning] cleans all sorts of....fabrics...in such a manner that nobody would ever think they had been wetted...it neither changes nor alters color‚ but it takes the dirt‚ oil‚ and grease out of silks‚ cotton‚ and wool assisted by labor.” History And an Overview In “Dry Cleaning‚ Part 1. The Process and History: From Starch to Finish‚” author Eugene Garfield noted the early history of dry cleaning. It has been studied that the Mycenaean civilization‚ which was in existence from 1600 - 1100
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