C - Alkenes And Ethanol Flashcards
1
Q
Which of alkenes and alkanes are unsaturated?
A
Alkenes because they can make more bonds
2
Q
What’s the general formula for alkenes?
A
2n (there are twice as many hydrogens as carbons)
3
Q
How can you test for an alkene?
A
By adding the substance to bromine water.
4
Q
What will happen to the bromine water if an alkene is present?
A
It will decolourise the bromine water - turning it from orange to colourless. This is because the double bonds have opened up and formed bonds with the bromine
