Alkenes Flashcards
1
Q
What is the functional group of alkenes?
A
Alkenes have C=C double bond.
2
Q
What is the general formula for alkenes?
A
CnH2n
3
Q
Why are alkenes unsaturated?
A
Double bond can open up - can make more bonds.
4
Q
Describe the reaction of alkenes with bromine?
A
Produce dibromoethane.
Addition reaction - C=C double bond split & halogen added to each C atom.
5
Q
Describe how bromine water can be used to distinguish between alkanes & alkenes?
A
Shake alkene with Bromine water - becomes colourless.
Orange bromine molecules react with alkene to form dibromoalkane - colourless.
Alkanes - no double bond - bromine water doesn’t react - solution stays orange.
