Fats,Oils and Soaps Flashcards
How are fats and oils formed?
Condensation reaction between a molecule of glycerol with carboxylic acids
Fatty acids
The carboxylic acids that attach to glycerol. They can be saturated or unsaturated.
Fats and oils combine with how many fatty acids?
3
Why do fats have a higher melting points than oils?
They are more saturated and therefore able to pack together more closely, this means they have greater intermolecular forces.
Why are fats and oils said to be hydrophobic?
They are insoluble in water
Why do fats and oils not dissolve in water?
They are non polar so cannot bond with water.
Soap
When fats and oils are treated with an alkali
Why does soap dissolve in water?
Soap molecules have an ionic head which is water soluble(attracted to water molecules) and a non polar tail.
Small droplets of one liquid dispersed in another liquid e.g grease and soapy water.
Emulsion
Which 3 origins are fats and oils taken from?
Vegetables,animals and marine.
