Top answers

Chemistry
A Level

What is meant by terms 'saturated' and 'unsaturated' when applied to alkanes and alkenes? Describe a chemical test to distinguish between the liquids hexane and hexene.

Saturated – contains single bonds only.Unsaturated – contains one or more carbon-carbon double bonds.Shake each with bromine water. Hexene will decolorise bromine water, which will go from orange to colou...

Answered by Kamile S. Chemistry tutor
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What are geometrical isomers? Explain, structurally, why geometrical isomers exist.

Molecules differing in the relative bond positions of two groups about carbon-carbon double bonds. Free rotation is not possible about a carbon-carbon double bond. Thus, groups attached to the double-bond...

Answered by Kamile S. Chemistry tutor
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The Nucleophilic substitution mechanism: i. give the mechanism for the reaction between bromoethane and sodium hydroxide solution; ii. explain why the reaction mechanism is called nucleophilic substitution mechanism.

ii. The nucleophile donates a lone pair of electrons to the electrophilic carbon atom in the halogenoalkene. The bromine atom is substituted by the hydroxide ion. The mechanism is accompanied by inversion...

Answered by Kamile S. Chemistry tutor
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Why is benzene more stable than expected?

All the carbons in benzene are sp2 hybridised. The carbons are each bonded to one hydrogen and all bonds to other carbon atoms in the ring are the same length. This bond is in between the bond ...

Answered by Chemistry tutor
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If you could give your best revision tip for exam preparation what would it be?

My best tip for exam preparation is to work your way through the course specification. This gives you the best understanding of exactly what you need to know for the exam, for example all the definitions ...

Answered by Chemistry tutor
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