Plant Oils and their Uses

Mind Map by , created over 6 years ago

GCSE Chemistry (Core GCSE) Mind Map on Plant Oils and their Uses, created by seth.bragg on 05/28/2013.

Created by seth.bragg over 6 years ago
Chemical Symbols
C2.1 Structure and Bonding
Polymers, alkanes and alkenes
Revision Timetable
B1.1.1 Diet and Exercise Flash Cards
Chemistry GCSE Review - States of Matter, Particles, Atoms, Elements, Compounds and Mixtures
Morgan Overton
exothermic and endothermic reactions
Crude Oils and others quiz
Dale George
GCSE Chemistry C1 (OCR)
Usman Rauf
Plant Oils and their Uses
1 Vegetable oils
1.1 Some fruits, seeds and nuts are rich in oils that can be extracted
1.1.1 The plant material can be and the oil is removed by pressing This is how olive oil is obtained Other oils may be more difficult to extract so they are dissolved in water and distilled, then purified to remove any water or other impurities This is how sunflower oil is obtained
1.1.2 Vegetable oils are important foods and fuels as they provide lots of energy and nutrients
1.2 Vegetable oils have higher boiling points than water so can be used to cook foods at higher temperatures than by boiling
1.2.1 This produces quicker cooking and different flavours but increases the energy that the food releases when eaten
2 Emulsions
2.1 Oils do not dissolve in water but they can be used to make emulsions
2.1.1 Emulsions are thicker than oil or water and have many uses that depend on their special properties They provide better texture, coating ability and appearance for example in salad dressings, ice creams, cosmetics and paints Emulsions are made using water, oil and an emulsifier Emulsifier contain two parts- a hydrophilic head and hydrophobic tail The hydrophilic part stays attracted to the water whilst the hydrophobic part stays in the oil so they do not separate
3 Saturated and unsaturated oils
3.1 Unsaturated oils have a carbon=carbon double bond which turns bromine water from orange to colourless
3.2 Vegetable oils that are unsaturated can be hardened by reacting them with hydrogen in the presence of a nickel catalyst at about 60 degrees celsius
3.2.1 Hydrogen adds to the carbon-carbon double bonds The hydrogenated oils have melting points so they are solids at room temperature, making them useful as spreads and in cakes and pastries

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