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Description
Flashcards by x_clairey_x, updated more than 1 year ago
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Created by x_clairey_x
over 10 years ago
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| Question | Answer |
| How do we extract oils from plants? | By pressing or distillation |
| What is pressing? | When oils are crushed out of a plant |
| What is distillation in plants? | The plants are put into water then boiled, the oil then separates from the water and plant |
| What are unsaturated oils? | Oils in which the hydrocarbons have double bonds, we can detect the double bonds using bromine water |
| What are the advantages of cooking with vegetable oils? | They have high boiling points |
| Do oils dissolve in water? | no |
| What is an emulsifier? | A substance that helps oil and water join together. |
| How does an emulsifier work? | The head of the emulsifier molecule likes water (Hydrophillic) and the tail doesn't like water (Hydrophobic). So the head of the molecule latches itself onto a water molecule and the tail latches onto the oil |
| What are emulsifiers used for? | To create emulsions used in body lotions, food, lip sticks and face creams |
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