Addition Reactions

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2

CnH2n

Alkenes

Cyclo-

alkanes

Unsaturated

Saturated

C4H8

C4H8

Slide 15

Butene

Cyclobutane

Unsaturated

Saturated

Reacts with

Bromine

Unreactive

No Reaction with

Bromine

Slide 16

C5H10

Describe how you could find out, which test tube contained pentene and which test tube contained cyclopentane

A

B

Pentene

Cyclopentane

Only Tube A decolourised bromine water.

Slide 17

Bromine Water

Alkenes react with Bromine water.

The bromine water changes from brown to clear.

Tube A must contain Pentene

Alkene

Bromine Water

Alkane