starting compound. Results: Melting Point: Compound | Experimental (°C) | Lit value (°C) | Ice-water | 2°C | 0°C | Naphthalene | 81-83°C | 80-82°C | Acetanilide | 113-116°C | 113-115°C‚ 128-129°C | Acetylsalicylic acid | 136-140°C | 135-140°C | Salicylic acid | 159-162°C | 158-160°C | Succinic acid | 186-188°C | 185-189°C | Compound Structure: Naphthalene | Acetanilide | Acetylsalicylic Acid | Salicylic acid | Succinic acid | Water | Eutectic Point Determination: Melting
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HOW TO GET RID OF SILVERFISH NATURALLY Silverfish are slivery bristletail insects that live in buildings and feed on starchy materials. These fairly harmless‚ serpentine creatures aren’t pleasant to have around the house. They feed on books‚ dead skin cells‚ and thrive in dark‚ wet spaces. Once you discover an infestation‚ you can get rid of the silverfish bugs by with insecticides or various methods you will learn about from this article. Silverfish bugs are not harmful to humans. However‚ they
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purify a sample. One of these techniques to make an impure sample pure is by recrystallization. This experiment includes the determination of a good solvent for recrystallization for compounds such as: acetanilide‚ acetamide‚ aspirin‚ benzoic acid‚ naphthalene‚ and sucrose‚ for solvents such as: water‚ ethanol‚ benzene‚ and ethyl acetate. Also pure acetanilide is achieved. here are five major steps in the recrystallization process: dissolving the solute in the solvent‚ performing a gravity filtration
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Analysis of Hydrocarbons Jennifer Alambra‚ Ma. Nancy Anulat‚ Alfonso Apepe*‚ Jacqueline Arsenal 3Bio4 Department of Biological Sciences - College of Science‚ University of Santo Tomas‚ Manila ABSTRACT The unknown hydrocarbon sample was differentiated and characterized by the use of three tests. The outcomes of these tests are as follows: Nitration test (negative)‚ Bromine test (positive) and Basic Oxidation test (positive). From these results the unknown sample can be classified
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Page 1 of 10 5.111 Principles of Chemical Science EXAM # 3 ============================================================================ Write legibly your name and your TA’s name below. Do not open the exam until the start of the exam is announced. The exam is closed notes and closed book. You have 50 minutes (1 academic hour) to complete it. ● Read each part of each problem carefully. ● Write your answers legibly in the corresponding spaces of the attached sheets. ● For problems requiring
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Melting Point and Boiling Point of Organic Compounds Bongo‚ Sayre‚ J1 1Student‚ Organic Chemistry 1 Laboratory / B11‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapúa Institute of Technology ABSTRACT The melting point of a substance is the temperature at which the material changes from a solid to a liquid state while the boiling point is the temperature at which it changes from liquid to solid. In this experiment‚ the main objectives were to determine the effects of the following
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factors affecting solubility 1. Effect of Temperature For some substances to dissolve in a given solvent‚ heat is absorbed. The reaction is endothermic. In this case‚ an increase in temperature increases solubility. For some substances‚ heat is released when they dissolve in a given solvent. The reaction is called exothermic. In this case‚ an increase in temperature decreases solubility. Generally‚ an increase in temperature in the solubility of solids in liquids increases solubility. But for
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The differences in the characteristics of states of matter are given in the following table. S. No. | Solid state | Liquid state | Gaseous state | 1. | Definite shape and volume. | No definite shape. Liquids attain the shape of the vessel in which they are kept. | Gases have neither a definite shape nor a definite volume. | 2. | Incompressible | Compressible to a small extent. | Highly compressible | 3. | There is little space between the particles of a solid. | These particles have a greater
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An experiment to determine the amount of urea in a specimen of urine. Introduction. Metabolism produces a number of toxic by-products‚ particularly the nitrogenous wastes that result from the breakdown of proteins and nucleic acids. Amino (NH2) groups are the result of such metabolic reactions and can be toxic if ammonia (NH3) is formed from them. Ammonia tends to raise the pH of bodily fluids and interfere with membrane transport functions. To avoid this the amino groups are converted
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BIOSENSORS ADVANCED BIOREPORTER TECHNOLOGIES FOR TARGETED SENSING OF CHEMICAL AND BIOLOGICAL AGENTS Steven Ripp and Gary S. Sayler Introduction Bioreporters refer to intact‚ living microbial cells that have been genetically engineered to produce a measurable signal in response to a specific chemical or physical agent in their environment (Figure 1). Bioreporters contain two essential genetic elements‚ a promoter gene and a reporter gene. The promoter gene is turned on (transcribed) when the
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