Alkenes and their reactions

Question 1

Alkenes are __________ hydrocarbons. This means that they contain a C _________-bond

Answer 1

unsaturated

double

Question 2

what is the general formula for Alkenes?

Answer 2

CnH2n

Question 3

How do you test for alkenes?

Answer 3

Add bromine water

Question 4

2 carbon alkene and it’s formula

Answer 4

Ethene - C2H4

Question 5

3 carbon alkene and it’s formula

Answer 5

Propene - C3H6

Question 6

4 carbon alkene and it’s formula

Answer 6

C4H8

Question 7

We don’t use alkenes as fuels as when they undergo combustion…

Answer 7

a smokey flame is produced

Question 8

What’s the name for the kind of reaction alkenes undergo?

Answer 8

ADDITION REACTIONS

basically, when the double bond breaks and stuff is added on

Question 9

What’s the reaction for when hydrogen is added to alkenes called?

Answer 9

hydrogenation

Question 10

What do we need during hydrogenation?

Answer 10

150 degrees of heat (very hot)

Ni as a catalyst

obvi, H2

Question 11

What’s the reaction where we add a halogen to alkenes called?

Answer 11

Halogenation

Question 12

What are the halogens?

Answer 12

F2 - Fluorine
Cl2 - Chlorine
Br2 - Bromine
I2 - Iodine

Question 13

What’s the reaction where we add water to alkenes called?

Answer 13

Hydration

Question 14

What are the conditions required for hydration?

Answer 14

Acid catalyst, and the temperature must be above 100 degrees as the water is used in steam form