Fats and oils
- Created by: Alice
- Created on: 12-05-13 16:36
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- Oils and Fats
- Oils
- Liquid at room temperature because of high levels of monounsaturated and polyunsaturated fats.
- Monounsaturated- when a long chain molecule contains only one double bond
- Unsaturated-when a long carbon chain molecule contains double bonds
- Polyunsaturated- have two or more double carbon-carbon bonds
- Removing some of the double bonds will raise the melting point and harden the oil. This increases it's shelf life.
- Can break the double bonds by adding hydrogen. The more hydrogen added, the greater viscosity. This process is used in production of margarine.
- Removing some of the double bonds will raise the melting point and harden the oil. This increases it's shelf life.
- naturally occuring organic compounds are based on esters made from an alcohol called glycerol.
- Liquid at room temperature because of high levels of monounsaturated and polyunsaturated fats.
- Soap
- Soap was the first detergent discovered to help dissolve oil in water.
- Soaps are made from plants oils or animal fats that contain fatty acids.
- To convert oils into soap you have to boil the oils and fats with the potassium or sodium hydroxide.
- It produces glycerol and salt of fatty acid
- This process is called saponifcation
- It produces glycerol and salt of fatty acid
- Detergents
- A substance that in solution aids the removal of dirt from surface
- Each detergent has a ..
- Hydrophilic - water-loving end
- Hydrophobic- water-hating end
- Oils to do come off surfaces because it is immiscible with water. Detergents help oils mix with water so oils can clean off
- When detergents clean an item
- Water hating side (hydrophobic) sticks to oil. Hydrophilic end is still in the water. The oil and grease is pulled off the item into the water
- Surface tension is when intermolecularforces between liquid particles,pulling them together. This forces a surface which the rest of particles stay behind
- Detergents contain substancesccalled surfactants that lower tension of water. This means oil can be pulled of surfaces
- Oils
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