null
US
Sign In
Sign Up for Free
Sign Up
We have detected that Javascript is not enabled in your browser. The dynamic nature of our site means that Javascript must be enabled to function properly. Please read our
terms and conditions
for more information.
Next up
Copy and Edit
You need to log in to complete this action!
Register for Free
112654
Plant Oils and their Uses
Description
GCSE Chemistry (Core GCSE) Mind Map on Plant Oils and their Uses, created by seth.bragg on 28/05/2013.
No tags specified
core gcse
gcse chemistry
gcse chemistry
core gcse
Mind Map by
seth.bragg
, updated more than 1 year ago
More
Less
Created by
seth.bragg
over 11 years ago
62
1
0
Resource summary
Plant Oils and their Uses
Vegetable oils
Some fruits, seeds and nuts are rich in oils that can be extracted
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
Vegetable oils are important foods and fuels as they provide lots of energy and nutrients
Vegetable oils have higher boiling points than water so can be used to cook foods at higher temperatures than by boiling
This produces quicker cooking and different flavours but increases the energy that the food releases when eaten
Emulsions
Oils do not dissolve in water but they can be used to make emulsions
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
Saturated and unsaturated oils
Unsaturated oils have a carbon=carbon double bond which turns bromine water from orange to colourless
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
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
Show full summary
Hide full summary
Want to create your own
Mind Maps
for
free
with GoConqr?
Learn more
.
Similar
GCSE CHEMISTRY UNIT 2 STRUCTURE AND BONDING
mustafizk
GCSE Chemistry C1 (OCR)
Usman Rauf
Chemical Symbols
Keera
Chemistry GCSE Review - States of Matter, Particles, Atoms, Elements, Compounds and Mixtures
Morgan Overton
exothermic and endothermic reactions
janey.efen
GCSE CHEMISTRY UNIT 2 STRUCTURE AND BONDING
ktmoo.poppypoo
Crude Oils and others quiz
Dale George
TItrations (how to do the experiment) (concentrations)
janey.efen
Polymers, alkanes and alkenes
amira-2000
C2.1 Structure and Bonding
elzzie
C1 Metals and their uses
mouldybiscuit
Browse Library