to extract and crystallize compounds in a mixture using acids and bases. 1 gram of the unknown was dissolved into 30 mL of ethyl acetate. The mixture was then transferred to a separatory funnel. Using aqueous solutions of different pH we were able to separate organic acids‚ bases and neutral compounds from each other. Using three 10 mL portions of HCl‚ we reacted the HCl with the base in solution. This made it possible to extract the base from the mixture. Organic acids are highly soluble in aqueous
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cooking which is also preferable. After cooking‚ the rice mixture then is spread on a ligau (rattan-made winnower)‚ cooled and sprinkled with powdered binokbok (organic yeast). It is evenly mixed using a wooden spatula and placed in a lopahan (rattan-made container) to ferment. The mixture must be kept in a dry and dark room but the initial juice that flows from it must be collected first before keeping. After two-three days‚ the mixture is now transferred into a jar. One must see to it that the
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information about a certain living organism. The investigation question for this lab is: How to obtain the DNA of kiwi and how it works? Hypothesis If I mash the kiwi fruit so that the surface area is big and some cells may break and add another mixture to
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and pyrimidium tribromide by refluxing the mixture. To test the purity of product I will take the melting point which should be around 240 ºC along with a flame test which should be green-blue. CHEMICAL PROPERTIES TABLE See Attached Lab Notebook Copies REACTION MECHANISM In this lab we used multiple techniques to complete and verify the bromination of trans-stilbene. First technique we used was to reflux the mixture; this contains having the mixture boiling so it will evaporate while the condenser
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the excipient as Poloxamer 188. Figure 4.6 DSC Thermogram of physical mixture of mirtazapine and excipients The DSC thermogram of the physical mixture of Drug and excipients shows the sharp endotherm at 112.88°C which is comparable to the endothermic peak of the pure drug obtained at 114.91 °C. Table 4.5 shows the individual melting points of the drugs and excipients and the endotherm obtained on analysis of the physical mixture. Table 4.5 Melting points of drug and excipients Excipient Drug Chitosan
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and the liquid started to become more solid. In the third reaction of which Barium Chloride and Sodium Sulphate were mixed‚ bubbles were again visible‚ however there were very few. After a couple of minutes the mixture turned very cloudy‚ into a solid white colour. 10 minutes later‚ the mixture was completely clear and the compounds had very clearly separated into salt and completely translucent liquid. For all of the reactions‚ the temperature remained
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I. Problem: Will natural dyes from plants effective in producing colored paste? II. Title: Using Natural Dyes form Plants In Producing Colored Paste III. Introduction: Our project is made from the raw materials such as starch‚ alum and annatto seeds. One of our reasons in making this project is it can help students save money because our product can be a substitute for glue. It doesn’t cost us too much time because we can make this in a short period of time. IV. Review of Related Literature:
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electrons. Molecules can be multiple atoms of the same element combined or the elements can be different. When the atoms are combined they become a compound and are given a new name which can sometimes relate to the original atoms used to create it. A mixture is the term given to two or more compounds combined.
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This reaction is characterized by the combining of an alcohol and an acid (with an acid catalyst) to yield and ester plus water. In order to accomplish this reaction‚ the reactants were refluxed for 30 minutes at 80 degrees Celsius ‚to yield a mixture‚ the mixture was then mixed with sodium hydrogen carbonate and dried with anhydrous sodium sulfate. The product obtained from this reaction was then weighed and yielded 3.5753g‚ the total percent yield of isopentyl acetate obtained was 60 %. The advantages
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Estimation of the Activation Energy for the Iodination of Acetone Through the Effect of Temperature on the Rate Constant Joel Costa‚ Alex Fuentes‚ Michael Chea‚ Rex Nwerem Dr. Morgan Ferguson July 9‚ 2013 ABSTRACT | It is often important to determine the rate at which a chemical reaction takes place‚ i.e.‚ how fast it yields the desired products. Temperature is one of the factors that influence the rate of reactions and it does so by providing energy to reactant particles so that a larger
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