PAG 5 Preparation of cyclohexene

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Created on: 18-08-20 11:06

part 1-preparation

Add 10cm3 pf cyclohexanol to flask, slowly add 4cm3 of conc H3PO4 and mix thoroughly,add anti bumping granules-set up for reflux, heat to 70`c for 15 mins, stop heating, let it cool, set up for distillation, raise temp slowly from 70-90`c

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part 2 Purification

Add equal volumes of saturated NaCl to solution in separating funnel,allow separation-discard lower aq layer, wash organic layer with equal volume of H2O, run into conical flask, add CaCl2(s),decant liquid into a weighed container,reweigh + find mass

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part 3-identification

test for the presence of a c=c bond in the product-use bromine water

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equations needed

actual/theoretical x 100, cyclohexene + bromine -> 1,2-dibromocyclohexane

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evaluation

yield may be lower as some parts of the mixture may be left in the beakers when measuring, heat loss/evaporation, impurity=H2O, redistilate

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Other cards in this set

Card 2

Front

part 2 Purification

Back

Card 3

Front

part 3-identification

Back

Card 4

Front

equations needed

Back

Card 5

Front

evaluation

Back

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PAG 5 Preparation of cyclohexene