4.5.4 - Alkenes

Question 1

what is an alkene !?

Answer 1

. Alkanes are hydrocarbons that fit the general formula

Question 2

What is the difference between an alkane and an alkene?

Answer 2

. Alkanes have one C=C double bond in the carbon chain

Question 3

Name and diagrams of the first few alkenes :

Answer 3

Question 4

What is the structural formula of an alkene (for butene)?

Answer 4

Question 5

Are alkenes saturated or unsaturated !?

Answer 5

I’ll Keynes for referred to as unsaturated because they have a C-C double bond

Question 6

How do alkenes react with bromine !?

Answer 6

. Alkanes react with bromine by breaking the C=C and adding bromine atoms in

Question 7

What four details do you need to know when reacting an alkene with bromine !?

Answer 7

. It’s in addition reaction
. The reaction happens without UV light
. It works with pure bromine, liquid or bromine water, which is orange.
. The mixture turns orange to colourless because bromine is used up in the reaction