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alkane-alkene-lab-answers

alkane-alkene-lab-answers - H O H 2 catalyst 6 a-d...

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Chemical Reactions of Alkanes and Alkenes
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1. Structure cyclohexane cyclohexene Or CH 2 CH 2 CH 2 CH 2 C H 2 C H 2 C C C C C C H H H H H H H H H H H H Or CH 2 CH 2 CH 2 CH 2 C H C H C C C C C C H H H H H H H H H H
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Table: 2-7 Cyclohexane Cyclohexene Polarity Non-polar Non-polar Solubility Insoluble Insoluble H 2 SO 4 None Cloudy Br 2 before Orange Orange Br 2 after Orange Colourless KMnO4 Purple Purple KMnO4 Purple Brown
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Question 1 - 5 1. Insoluble because they are non-polar. Water is polar. Like-dissolves-like. 2. Alkanes: unreactive, Alkenes: most 3. A double bond has both 4. Weaker, projects outward 5. a) addition b) it was the (acid) catalyst c) accelerates a reaction without being used up
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5 d) Cyclohexene + H 2 SO 4 + H 2 O cyclohexanol e) Found in water because it has a polar moiety (it is polar) f) cyclohexanol (the product / the one to the right) C C C C C C H H H H H H H H H H + C C C C C C H H H H H H H H H H OH
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Unformatted text preview: H O H 2 catalyst 6 a-d: Cyclohexene + Br 2 a) Orange b) Addition c) C C C C C C H H H H H H H H H H + Br Br C C C C C C H H H H H H H H H H Br Br d) Bromine was used up (disappeared) 7 : Cyclohexene + KMnO 4 C C C C C C H H H H H H H H H H + C C C C C C H H H H H H H H H H OH OH O H 2 KMnO 4 + KOH + MnO 2 C. Cyclohexene + Br C C C C C C H H H H H H H H H H + Br Br C C C C C C H H H H H H H H H H Br Br Isomers: cis-1,2-dibromocyclohexane trans-1,2-dibromocyclohexane E. Cyclohexene + KMnO 4 Isomers: cis-1,2-cyclohexanediol trans-1,2-cyclohexanediol C C C C C C H H H H H H H H H H + C C C C C C H H H H H H H H H H OH OH O H 2 KMnO 4 For more lessons, visit www.chalkbored.com...
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