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Flashcards in Alkenes Deck (13):
1

Alkenes have ____ carbon bonds

Alkenes have double carbon bonds

(ethene)

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2

Define 'alkenes'

Hydrocarbons which have a double bond between two of the carbon atoms in their chain

3

Alkenes are known as ____ because they can ____ ____ ____

Alkenes are known as unsaturated because they can make more bonds

4

How can alkenes make more bonds?

The double bond can open up, allowing the two carbon atoms to bond with other atoms

5

Name the first two alkenes and the amount of carbon atoms in them

1. Ethene (2 Cs)

2. Propene (3 Cs)

6

What is the general formula for alkenes?

+ define with words

CnH2n

They have twice as many hydrogens as carbons

7

Draw ethene's structure and give its formula

C2H4

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8

Draw propene's structure and give its formula

C3H6

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9

What is the test for alkenes?

Bromine water - it turns it from orange to colourless

10

What do alkenes do to bromine water?

Decolourises it turning it from orange to colourless

11

Why do alkenes turn bromine water from orange to colourless?

Because the double bond open up and form bonds with the bromine

12

Name the affixes from 1-4 that tell you how many carbon atoms are in an alkene/alkane, and what comes after?

1. Meth-

2. Eth-

3. Prop-

4. But-

SHAPES (e.g. pent-, hex-, hept-)

13

What is the acrostic memory thing for remembering the  order of the affixes of alkenes and alkanes?

M y

E lephant

P oos

B lue

SHAPES