Emulsions:
How can plant oils be used?
Oils do not dissolve in water. They can be used to produce emulsions. Emulsions are thicker than oil or water and have many uses that depend on their special properties.
Steps for the investigation
Mix equal volumes of vegetable oil and water with varying amounts of emulsifier,
such as egg yolk, dilute washing-up liquid or lecithin, to determine either how long it takes for the mixture to separate or the height of the aqueous layer after the mixture has stood for a set length of time.
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