haloalkanes

Question 1

what is a haloalkane

Answer 1

alkane with at least one halogen

Question 2

What is the nature of the carbon halogen bond

Answer 2

It is polar due to the difference in elctronegativity between c and the halogen

Question 3

Nucleophilic substitution of haloalkanes (hydrolysis)

Answer 3

Draw the polar C- Br bond with curly arrows
Draw a curvy arrow from the OH- with two delocalised e- to the carbon

put the OH where the Br was and have Br- with two delocalised e-

Question 4

Why do iodoalkanes hydrolyse the fastest

Answer 4

The C-I bond is the weakest

Question 5

What experiment would you carry put to investigate the speed of haloalkanes

Answer 5

Add each haloalkane to ethanol and silver nitrate, the dodo will go first then the promo then the chloro

Question 6

What is a CFC

Answer 6

Contain only chlorine fluorine and carbon

Question 7

How do chlorine radicals destroy the ozone layer

Answer 7

Cl. + O3 → O2 + ClO.
ClO. + O → O2 + Cl.

overall O3 + O → O2

Question 8

What is the reaction for the formation of ozone

Answer 8

O2 → 2 O. uv light (reverse reaction gives out IR)
O2 + O. → O3

Question 9

What is the alternative to CFCs

Answer 9

HCFC’S

Question 10

How are HCFCs better than CFCs

Answer 10

they break down before they reach the ozone layer

Question 11

How does the ozone layer protect us

Answer 11

absorbs harmfull uv radiation