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Flashcards in Alkenes Deck (8):
1

What kind of bond does an alkene have?

A double carbon bond
C == C

2

Why are alkenes unsaturated?

They can make more bonds - the double bond can open up, allowing the 2 carbon atoms to bond with other atoms

3

What is the general formula for alkenes?

CₙH₂ₙ

4

What are the first 2 alkenes?

Ethene (2 carbons) and Propene (3 carbons)

5

What is the formula and structure of ethene?

C₂H₄
H H
> C == C <
H H
p55

6

What is the formula and structure of Propene?

C₃H₆
H H H
H--C -- C == C <
H H
p55

7

How do you test for an alkene?

1) Adding the substance to bromine water
2) An alkene will decolourise the bromine water, turning it from orange to colourless

8

Why do alkenes decolourise bromine water?

The double bond has opened up and formed bonds with the bromine