Chemistry C1 Emulsifiers

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What is an emulsion?
Lots of droplets on one liquid suspended in another liquid, e.g. mixing an oil with water
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What are emulsifiers?
Emulsifiers are molecules with one part that is attracted to water and another part that's attracted to oil or fat.
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What do emulsifiers do?
They help to stop the two liquids in an emulsion from separating out, for example oil and water naturally separate into two layers with the oil floating on top of the water - they don't "want" to mix.
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What are the two parts of an emulsifier called?
The HYDROPHILIC HEAD and the HYDROPHOBIC TAIL
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What are the properties of each of these parts?
Hydrophilic - Attracted to water and hates oil ; Hydrophobic - Attracted to oil and hates water. The hydrophilic end bonds to water molecules and the hydrophobic end bonds to oil molecules.
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How do emulsifiers work?
The oil forms droplets surrounded by a coating of emulsifier with the hydrophilic bit facing outwards which repels the other droplets of oil and attracts water molecules. This means the emulsion won't separate out.
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What are examples of foods with emulsifiers?
Mayonnaise, low-fat spread and ice cream
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Card 2

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What are emulsifiers?

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Emulsifiers are molecules with one part that is attracted to water and another part that's attracted to oil or fat.

Card 3

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What do emulsifiers do?

Back

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Card 4

Front

What are the two parts of an emulsifier called?

Back

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Card 5

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What are the properties of each of these parts?

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