titre as the NaOH had been neutralised. Experimental: Method: Firstly two solutions were prepared to show the colour of the Phenol Red indicator in acid and alkaline conditions. These colours were then used to determine the end point of each titre. In the experiment 0.100M HCl (acid) was added‚ from a burette‚ to a solution of 25cm3 of NaOH (base) and several drops of Phenol red indicator. This was done until the base had been neutralised (signified by a colour change from pink to yellow). A magnetic
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COMPARATIVE INVESTIGATION OF ORGANIC COMPOUNDS Abstract Organic compunds were examined to a comparative investigation to differentiate the properties of each sample. The physical state at room temperature‚ odor and color of the sample were noted by simple observation. In terms of solubility in H2O‚ 5% NaOH solution and 5% HCl solution‚ the samples were classified as to miscible‚ slightly immiscible or immiscible for liquid; and very soluble‚ soluble‚ partially soluble or insolubse for solid. The
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functional group of an organic compound based on the tests performed. Several organic compounds with different functional groups were tested to identify the functional groups present in the compound. n-heptane‚ pentene‚ benzene‚ heptanol‚ sec-butanol‚ phenol‚ acetyl chloride‚ buteraldehyde‚ benzaldehyde‚ 2-butanone‚ propanoic acid‚ sucrose‚ diethyl ether‚ butyl bromide‚ acetonitrile‚ L-alanine‚ n-amyl acetate‚ benzene sulfonyl chloride and aniline were used as test compounds. Observations were noted‚
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China’s demand for paint has grown at a fast pace in the past decade. In the next five years‚ both production and demand will continue to grow. Paint Markets in China examines China’s economic trends‚ investment environment‚ industry development‚ supply and demand‚ industry capacity‚ industry structure‚ marketing channels and major industry participants. Historical data (2003‚ 2008 and 2013) and long-term forecasts through 2018 and 2023 are presented. Major producers in China are profiled China’s
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texture. For triple sugar ion is used to differentiate enterics based on the ability to reduce sulfur and ferment carbohydrates. It contains lactose‚ sucrose‚ a small amount of glucose (dextrose)‚ ferrorus sulfate and the pH indicator phenol red. As with the phenol red fermentation broths‚ if an organism can ferment any of the three sugars present in the medium‚ the medium will turn yellow. If an organism can only ferment dextrose‚ the small amount of dextrose in the medium is used by the organism
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(pKa) of 9.6 at 24 degrees Celsius. It is soluble in water‚ ethanol and methanol but it is insoluble in ether 2.Atenolol can be synthesized in two parts. The first synthesis is with the reaction of phenol and formaldehyde to form the 4-(hydroxymethyl)phenol the second is treating the 4-(hydroxymethyl)phenol compound with NaCN in hot DMF to form the product of 2-(4-hydroxyphenyl)acetonitrile. Then 2-(4-hydroxyphenyl)acetonitrile will be refluxed with H2O and Ethanol. After the hydrolysis with water and
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was dropped into an Erlenmeyer flask filled with 50 mL of D-water so that it could become dissolved. After the tablet was completely dissolved‚ a few drops of phenol were added‚ and the base was added very slowly‚ changing the color
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CO2 concentration because of how quickly it was detected. See Table 1. In the second experiment‚ the original pH of the alkaline phenol red was 4.0. After adding CO2 by exhaling‚ the color changed from a deep red to a bright red. The pH of the solution also changed; it changed to a 6.0 so it became more neutral by adding CO2 which is more basic then the alkaline phenol red. See Table 2.
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genomic DNA from animal tissue 2. To observe the phases of animal tissue in micro centrifuge. Materials 1. Fresh tissue of animal ( fish ) 2. Mortal and pestle‚ 3. Petri dish 4. Lysis buffer 5. 1.5mL centrifuge tube 6. Phenol : chloroform (1:1) 7. Proteinase K 8. 3M NaOAc (ph 6.0) 9. Absolute ethanol 10. 70% ethanol 11. TE buffer / distilled water Procedure 1) Fresh fish was cut to 0.5cm 2) Fish tissue washed with 70% alcohol 3) Wetted
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substance of bisphenol A. Surprisingly‚ this widely-talked about chemical substance is a man-made matter constructed by a A. Dianin‚ a Russian scientist‚ in 1891. When the examiner first tried working on synthesizing bisphenol A‚ he came up with two phenol groups‚ which have a chemical formula of C6H6O‚ and integrated them with an acetone group‚ which has a chemical formula of C3H6O. This whole process of producing bisphenol A required a third substance that would effectively maximize the rate of the
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