it exists as white powder or colourless crystals with a chemical formula of H3BO3 or B(OH)3. Apparatus and materials: •Sodium tetraborate •Concentrated hydrochloric acid •Concentrated sulphuric acid •Methyl red indicator •Mannitol •Beaker •Methanol •Distilled water •Electric heater •Ice •Test tube •Test tube rack •Glass rod •Suction funnel •Suction pump •Filter flask •Filter paper •Spatula •Watch glass •Splint Procedures: 1. About 10g of sodium tetraborate (borax) is
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a. 2. The first part of this report defines a portfolio and how it can benefit the investment decisions of Northern Telecom. 7. The clear problem that has risen follows: the benefit of the air contaminate model often maligns by aborting launches‚ perhaps unnecessarily. 8. As a medical assistant/receptionist‚ my primary responsibilities included completing and processing insurance claim forms. I prepared the patient and examination room for surgeries and assisted in the manufacturing‚ fitting‚ and
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138.17 g 57 °C t-Butyl alcohol 74.12 g .79 g/ml Sulfuric Acid 98.08 g 1.84 g/ml Methanol 32.05 g Ethanol 46.08 g 1‚4-Di-t-butyl-2‚5-dimethyloxybenzene 250.37 g 104-105 °C Safety Information: Use caution with the sulfuric acid as it is corrosive and can cause severe burns. Keep heat and flames away from the methanol and ethanol‚ as both are flammable. Dispose of all wastes in the proper containers. Dispose of all broken glass in the broken
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The Mass of Acetylsalicylic Acid in Aspirin ------------------------------------------------- Purpose The purpose of the lab is to determine the mass of the ‘active ingredient’ in a commercial ASA tablet. ------------------------------------------------- ------------------------------------------------- Introduction There are three main theories surrounding acids and bases including the Arrhenius‚ Bronsted-Lowry‚ and Lewis theories. The Arrhenius theory of acids and bases states that
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over crushed ice (25g)‚ and waited for 5 minutes until the ice was completely melted. The product‚ after isolation by vacuum filtration‚ was washed with two portions of cold water (30mL) and ice-cold methanol (25mL). Recrystallization of product was carried out with minimum amount of solvent methanol‚ which resulted in the final product of methyl m-nitrobenzoate (3.84g‚ 0.0212mol)‚ with the percent yield of
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acetate (1.5 mls/student)‚ dichloromethane (6 mls/ student)‚ 30% acetone in heptanes (3 mls/student)‚ 95% ethanol (20 mls/student) wk 4: 1‚3 diphenylacetone (0.5 g/student)‚ triethylene glycol (5 mls/student)‚ 40% benzyltrimethylammonium hydroxide/methanol (0.5 mls/student) Part A: Thiamine catalyzed condensation benzoin condensation of benzaldehyde Procedure: (Week 1) Dissolve
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writing balanced chemical equations. Hypothesis If methyl-2-propanol is reacted with formic acid then the product should be 2-methylpropyl methanoate. If 1-octanol is reacted with acetic acid then the product should be 1-octyl ethanoate. If methanol is reacted with salicylic acid then the product should be methyl salicylate. If 1-pentanol is reacted with acetic acid then the product should be pentyl ethanoate. Materials Equipment 4 test tubes graduated cylinder (10 mL) 150 mL
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stationary phases. Technique in which the stationary phase is more polar than the mobile phase (e.g. toluene as the mobile phase‚ silica as the stationary phase) is called normal phase liquid chromatography (NPLC) and the opposite (e.g. water-methanol mixture as the mobile phase and C18 = octadecylsilyl as
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leaves‚ and fruits. · Roots and leaves‚ collected the year round. · Fruits‚ collected May to July. · Sun-dry. Constituents - The bark is poisonous‚ containing an toxic alkaloid. - Contains phenolics‚ flavonoids‚ anthocyanins and carotenoids. - Methanol extract of leaves yielded six polyphenols‚ viz.‚ corilagin‚ gallic‚ ferrulic‚ and ellagic acids‚ together with flavone vicinin II and dimmer amentoflavone. (See study below) (10) Properties Acidic tasting‚ warming nature. Astringent‚ antidysenteric
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International Journal of Pharma and Bio Sciences RESEARCH ARTICLE ARTICALTICLE MEDICINAL CHEMISTRY SYNTHESIS‚ CHARACTERIZATION AND BIOLOGICAL STUDIES OF SCHIFF BASES METAL COMPLEXES CO (II)‚ ZN (II)‚ NI (II)‚ AND MN (II) DERIVED FROM AMOXICILLIN TRIHYDRATE WITH VARIOUS ALDEHYDES. Corresponding Author SUNIL JOSHI Synthetic Lab‚ P. G. Department of Chemistry‚ Faculty of Science‚ Government College‚ Ajmer‚ Rajasthan (INDIA). Co Authors VATSALA PAWAR ‚ AND V.UMA Synthetic Lab‚ P. G
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