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Identifying an Unknown Compound
Member rating: No Rating | Words: 1029 | Submitted: Wed Mar 19 2008
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Identification of an Unknown Organic Compound Ensure a lab coat, safety glasses and gloves are worn during the experiments and work in a ventilated area. For all experiments test tubes and pipettes will be required. ALKENES: Alkenes contain a double carbon-carbon bond. APPARATUS: Unknown compound, bromine water. METHOD: Add 5 drops of bromine water to a test tube containing 1cm3 of the unknown and shake. OBSERVATION: Bromine water will decolourise from orange. EXPLANATION: The alkene decolourises bromine water and produces 1,2-dibromoethane. The double bond allows electrophilic addition reactions to occur. HAZARDS: Bromine vapour released from the water is 1^harmful^1 (see appendix). ESTERS: Esters are sweet- smelling products from reactions between carboxylic acids and alcohols. APPARATUS: Unknown compound, phenolphthalein, water bath, NaOH. METHOD: 1Add 5 drops of phenolphthalein and NaOH to the unknown in a test tube and shake. Then heat the solution in a water bath.1 OBSERVATION: A pink colour will appear once the indicator has been added and...
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