Chemistry Key Word Definitions (U-Z)

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What is a universal indicator?
A mixture of indicators which can change through a range of colours depending on the pH of a solution. Its colour is matched to a pH number using a pH scale. It shows how strongly acidic or alkaline liquids and solutions are.
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What is unsaturated hydrocarbon?
A hydrocarbon whose molecules contain at least one carbon-carbon double bond.
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What is unsaturated oil?
Plant oil whose molecules contain at least one carbon-carbon double bond.
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What is vegetable oil?
Oil extracted from plants.
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What is viscosity?
The resistance of a liquid to flowing or the 'thickness' or resistance of a liquid to pouring.
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What are weak acids?
Acids that do not ionise completely in aqueous solutions.
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What is a yield?
Percentage yield, see (P) cards.
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Other cards in this set

Card 2

Front

What is unsaturated hydrocarbon?

Back

A hydrocarbon whose molecules contain at least one carbon-carbon double bond.

Card 3

Front

What is unsaturated oil?

Back

Preview of the front of card 3

Card 4

Front

What is vegetable oil?

Back

Preview of the front of card 4

Card 5

Front

What is viscosity?

Back

Preview of the front of card 5
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