Alkenes&electrophillic addition

Question 1

What is an alkene?

Answer 1

Hydrocarbon

Question 2

What makes an alkene different to an alkane?

Answer 2

c=c bond

Question 3

What is the general formula of an alkene?

Answer 3

CnH2n

Question 4

What type of molecule are those with C=C bonds?

Answer 4

Unsaturated

Question 5

What makes alkenes reactive?

Answer 5

The C=C bond has a high electron density

Question 6

Why does the double bond get attacked by the electrophile?

Answer 6

It has a high electron density

Question 7

What is an electrophile?

Answer 7

Electron loving molecule

Electron acceptors

Question 8

What reaction do alkenes go through?

Answer 8

electrophilic addition

Question 9

What is formed in the second stage in the electrophilic addition reaction?

Answer 9

Carbocation intermediate

Question 10

Generally, what happens in an electrophilic addition reaction?

Answer 10

The double bond opens and two new groups are added

Question 11

How do you test for an alkene?

Answer 11

Add bromine water
Shake
Positive result = bromine water changes from orange to colourless