Alkanes Pt 2 (OG)

Question 1

Alkanes are non-polar meaning they are un-

Answer 1

Unreactive

Question 2

Bonds in alkanes are very…. Making them harder to…. Causing them to be……

Answer 2

Strong,break, unreactive

Question 3

How can alkanes react?

Answer 3

Through free radicals

Question 4

Are free radicals highly reactive?

Answer 4

Yes

Question 5

Free radical Substitution is…

Answer 5

a reaction between an alkane and a halogen to form a halogenoalkane

Question 6

First step of Free radical substitution

Answer 6

Initiation, where ultraviolet light is shun onto the reaction mix the energy from this causes the single covalent bond in the molecule to break making two free radicals

Question 7

Process of a covalent bond splitting using ultraviolet light is called..

Answer 7

Homolytic fission

Question 8

Name and outline the second stage of free radical substitution

Answer 8

Propagation stage, the free radical reacts with the alkane molecule by taking a hydrogen atom to pair with its unpaired electrons
In step two of propagation the free radical made from step one now reacts with another molecule forming another free radical and a different alkane

Question 9

Propagation step 1 and 2 form a chain reaction together. Why?

Answer 9

The free radical formed in stage 2 can go back and react with the alkane in propagation step 1 and the free radical alkane formed in stage 1 can react in stage two

Question 10

Outline and name the last step of Free radical substitution

Answer 10

Termination, two free radicals react together to form a molecule with no unpaired electrons which can no longer take part in the reaction

Question 11

What is a drawback of free radical substitution

Answer 11

We get a lot of side products