1.6 Plant oils Flashcards
What are plant oils?
Plant oils are oils derived from plant sources, as opposed to animal fats or petroleum.
What is the formula for ethanol?
C2H5OH
What is a emulsifier?
A substance that stabilizes an emulsion, in particular an additive used to stabilize processed foods.
What is cracking?
splitting up long chain hydrocarbons by passing vapour over a hot catalyst.
How is oil extracted from plant material?
pressing, steam distillation or solvent extraction
What catalyst is used in cracking?
Aluminium oxide
What properties do emulsions have?
They are thicker than oil or water so more spreadable. The more oil the thicker the emulsion is.
What are the advantages and disadvantages of reacting ethene with steam?
cheap, not much wasted, pure, fast and non renewable
Why are vegetable oils good for you?
They contain essential nutrients and fatty acids and provide energy.
What does the term hydrophobic mean?
Water hating
What does the term hydrophilic mean?
Water loving
What is the hydrophobic tail attracted to in an emulsion?
The oil
What is the hydrophilic head attracted to in an emulsion?
The water
Give an example of an emulsifier.
Egg yolk, mustard, washing up liquid or lecithin.
Give an example of an emulsion.
Ice cream, salad dressing, mayonnaise.
