Part A- Preparation of p-Acetotoluidide • After completing the experiment‚ a yield of 0.21 g of a pure white crystal were collected from the Buchner funnel‚ and when compared to the calculated theoretical yield‚ 0.82 g (found in Calculations 1.A)‚ a percent yield of 25.4% can be calculated for this procedure. Although this value may not seem favorable for this procedure‚ when compared to the expected value described by the laboratory manual‚ which was 0.4 g‚ it can be seen that the procedure performed
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oC and allowed for it to grow overnight; the following day we came back to finish our confirmatory test. To do so‚ we added 10 drops of Kovac’s reagent to the tube and watched for a color change. Results: A positive test‚ indicated by a red/pink layer‚ is due to the tryptophan being hydrolyzed producing indole‚ pyruvic acid‚ and ammonia. The Kovac’s reagent indicates solely the presence of indole because the bacteria will use the pyruvic acid and ammonia for nutritional needs. A negative test is indicated
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Name: Angelica G. Morales Course: BSENVISCI- II Date performed: February 20‚ 2013 Date submitted: February 27‚ 2013 EXPERIMENT NO. 5 STOICHIOMETRY Stoichiometry From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Stoichiometry (pron.: /ˌstɔɪkiˈɒmɨtri/) is a branch of chemistry that deals with the relative quantities of reactants and products in chemical reactions. In a balanced chemical reaction‚ the relations among quantities of reactants and products typically form a ratio
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Flotation machine is the most important equipment in the process of flotation. In addition to the reagents‚ the technological process‚ the performance of the flotation machine has considerable influence on flotation effect. Flotation machine can be divided into: mechanical agitation type flotation machine‚ inflatable flotation machine‚ the hybrid flotation machine or air mixing type flotation machine‚ air- releasing flotation machine. (1) The mechanical agitation type flotation machine
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* Introduction to Organic Chemistry Understand the basis of drawing organic structures Depicting 3-D structures in 2-D Most organic compounds have a three-dimensional structure. How do we represent structures on our two-dimensional page? For example‚ methane is a tetrahedral molecule: Bonds in the plane of the paper: Bonds coming towards the observer: (out of the page) Bonds going away
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of the iodine reagent to each. Record your observations. Use the visual color reference table to assess the enzyme activity. After you have recorded your observations‚ rinse off the spot plate. 4. Repeat step 3 after the mixtures have had five minutes of reaction time. 5. Repeat step 3 after the mixtures have had ten minutes of reaction time. 6. In the test tubes where hydrolysis occurred‚ the presence of glucose can be confirmed with Benedict’s reagent. Add 3 mL of Benedict’s reagent to each test
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then a translucent or opaque spot will appear. Materials: * 8 test tubes * test tube rack * test tube holder * glass stirring rod * sharpie marker * how water bath * iodine solution * brown paper bag * Biuret reagent * benedicts solution * 20 ml each: 1. honey solution 2. egg white and water solution 3. gelatin and water solution 4. melted butter and water solution 5. apple juice and water solution 6. distilled water 7. unknown
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UNIVERSITI TEKNOLOGI MARA COURSE INFORMATION Confidential Code Course Level Credit Hours Contact Hours : : : : : CHM 556 Organic Chemistry II Degree 4 3 hr (Lecture) 3 hr (Practical) 3 Core CHM 456 Part Course Status Pre-requisite : : : Course Outcomes : Upon completion of this course‚ students should be able to: 1. Determine functional groups present in organic compounds using Infrared Spectroscopy and interpret Nuclear Magnetic Resonance spectra and relate the information to structural
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EXPERIMENT 8 – Reactions of Hydrocarbons Properties and Identification of Hydrocarbons Purpose: a) To identify saturated and unsaturated hydrocarbons using properties and reactions. b) Study substitution and addition reactions. Equipments test tube rack (1) test tube holder (2) 100 mL beaker medium test
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Q4. Which reagent or test could you use to distinguish between phenylacetylene and vinylbenzene? a) NaOH/H2O b) Br2/CCl4 c) IR Spectroscopy d) CrO3/H2SO4 Q5. Which of the following statements about cyclooctatetraene is NOT true? a) The compound rapidly decolorizes Br2/CCl4 solutions. b) The compound rapidly decolorizes aqueous solutions of KMnO4. c) The compound readily adds hydrogen. d) The compound is comparable to benzene in stability. Q6. Which reagent(s) would serve
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