Synthesis of 3-Acetylcoumarin Introduction In thi lab we were asked to make coumarin. Coumarin is a fragrent organic chemical compound. It is a natural substance found in many plants. The name comes from the french term for tonka bean. The substance was first isolated as a natural product in 1820. Coumarin has been showed to be useful in biological activity‚ but they have been approved for few pharmacutical uses. It has been reported that coumarin activity includes HIV‚ tumors
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Working out mean or average results 26.3+26.1+23.8= 76.2/3=25.4 The average ml of HCL needed in order to react for a colour change was 26.5ml. NaHCo3+ HCl NaCl+H2O+Co2 Calculation: 25 ml 0.1 mole dm3 26.3+26.1+23.8= 76.2 ml 76.2÷3=25.4÷1000=0.025 volume 0.1x0.25ml=0.025 moles 0.025÷0.254=0.98 (Rounded up to one decimals places) =0.1 M To begin with concentration I have choose three volumes form my results table which I have added them and then divided by three to get an average results. Describe
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Figure 1: Formation of benzocaine from p-aminobenzoic acid Experimental P-aminobenzoic acid (1.211g) and absolute ethanol (15mls) were combined with three boiling chips in a 50ml round bottom flask. The round bottom flask was placed on a heating plate and was refluxed starting at 109 ̊C. The solution began boiling at 111 ̊C. It was allowed to reflux for approximately 30 minutes and the solid was dissolved. The round bottom flask was then placed in an ice bath and allowed to cool to
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Making perfume from Gumamela is a popular science project for children due to reasonably easy process that is involved. Before you begin making Gumamela perfume you will need to make sure that you have the correct ingredients and equipment. You will need: • One cup of gumamela flowers (a type of hibiscus) • Five by five inch of muslin pouch • A rubber band • Half an ounce of gumamela essential oils • Two quart glass bowl • A potato masher • One cup of distilled water • One quarter of a
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Colligative Properties & Osmotic Pressure Peter Jeschofnig‚ Ph.D. Version 42-0149-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate student’s writing of lab reports by
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The purpose of column chromatography is to separate one compound from another by the differing polarities in the compound. This technique is important in organic chemistry because certain experiments may require the separation of compounds in solution to be used for chemical synthesis and/or analysis of a particular desired product by isolating it. Fluorene is to be separated from 9-fluorenone using the technique of column chromatography. The success of separation and purity is determined with analyzation
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Chemistry Controlled Assessment Research – Descaling coffee machines Q1) The advantages and disadvantages of these commonly used de-scalers Ethanoic Acid (Acetic Acid) Citric Acid Sulfamic Acid Ethanoic Acid Advantages: Ethanoic acid is non-toxic and is a weak acid [4]‚ meaning it will not do any damage to most surfaces as it does not corrode or bind to other metals‚ therefore can be easily removed through washing or rinsing it [2]. Disadvantages: Ethanoic Acid is the slowest de-scaler of
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One cup of gumamela flowers (a type of hibiscus) • Five by five inch of muslin pouch • A rubber band • Half an ounce of gumamela essential oils • Two quart glass bowl • A potato masher • One cup of distilled water • One quarter of a cup of ethyl alcohol and a 20 oz spray bottle. If this experiment is being carried out for a child’s investigatory project‚ make sure that they are supervised by an adult at all time. Once all of the ingredients and equipment has been collected‚ the following
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Assignment Purification of a Mixture INTRODUCTION Mixtures obtained from the biosphere‚ lithosphere‚ hydrosphere or atmosphere can be industrially separated into their constituents. Petrol for example is obtained from crude oil found in the lithosphere. RESEARCH SKILLS When researching this assignment you will access a variety of secondary resources including web sites and textbooks. Please include a detailed bibliography You should also consider both the validity and reliability of your
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Experiment 3Quantitative Separation of Mixtures This experiment performs the quantitative separation of thecomponents of a mixture. A mixture is the mixing of two or more substancestogether. The proportions of the components in the mixture can be varied.And the resulting mixture can be either homogeneous or heterogeneous‚depending on the properties of components such as solubility.In this experiment‚ you are going to separate a water-solublecomponent from water-insoluble components
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