CL1.6 products from oil

Question 1

bromine water reactions

Answer 1

alkene + bromine =colourless

alkane + bromine=stays orange

Question 2

Hydration

Answer 2

ethane is hyf=drated with steam and a catalyust to make ethanol
ethane + steam =ethanol

Question 3

polymerisation

Answer 3

joining monomers together to form a polymer

Question 4

Cracking Hydrocarbons

Answer 4

We can break down hydrocarbons in a process called cracking
• Cracking is normally carried out at high temperatures using a catalyst. This is known
as catalytic cracking
• Catalytic cracking takes place in a cat cracker:
- The fraction produced from crude oil is heated to form a gas
- The hydrocarbon gas is passed over a hot catalyst where thermal
decomposition takes place
- The larger molecules split apart to form smaller molecules, which are more useful

Question 5

addition polymerisation

Answer 5

Monomers join together when the double bonds in the alkenes ‘open up’ and are
replaced by single bonds of thousands of other molecules joining together
• This reaction is an addition reaction, and since a polymer is made, we call it
addition polymerisation

Question 6

What are plastics made from

Answer 6

Plastics are made from huge molecules, which consist of many smaller molecules
joined together. The small molecules are monomers, and the larger molecules are
called polymers
• We are able to make many different plastics which all have different properties
• Ethene (C2H4) is the
smallest unsaturated
hydrocarbon molecule,
which we can turn into
a polymer known as
poly(ethene)