Chemistry Key Word Definitions (O-P)

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What is an ore?
Rock which contains enough metal to make it economically worthwhile to extract the metal.
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What is oxidation?
The reaction when oxygen is added to a substance (or when electrons are lost)
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What is oxidised?
A reaction where oxygen is added to a substance (or when electrons are lost from a substance).
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What is a particulate?
Small solid particle given off from motor vehicles as a result of incomplete combustion of its fuel.
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What is a percentage yield?
The actual mass of product collected in a reaction divided by the maximum mass that could have been formed in theory, multiplied by 100.
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What is the periodic table?
An arrangement of elements in the order of their atomic numbers, forming groups and periods.
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What is permanent hard water?
Hard water whose calcium and/or magnesium ions are not removed when the water is boiled, thus remaining hard.
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What is a pH scale?
A number that shows how strongly acidic or alkaline a solution is. Acids have a pH value of less than 7 (pH 1 is strongly acidic). Alkalis have a pH value above 7 (pH 14 is strongly alkaline). A neutral liquid has a pH value of 7.
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What is phytomining?
The process of extraction of metals from ores using plants.
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What is a pipette?
A glass tube used to measure accurate volumes of liquids.
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What is a polymer?
A substance made from very large molecules made up of many repeating units, for example, poly(ethene).
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What is polymerisation?
The reaction of monomers to make a polymer.
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What is a precipitate?
An insoluble solid formed by a reaction taking place in solution.
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What is a product?
A substance made as a result of a chemical reaction.
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What is a propene?
An alkene with the formula C_(3)H_(6).
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What is a proton?
A tine positive particle found inside the nucleus of an atom.
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Other cards in this set

Card 2

Front

What is oxidation?

Back

The reaction when oxygen is added to a substance (or when electrons are lost)

Card 3

Front

What is oxidised?

Back

Preview of the front of card 3

Card 4

Front

What is a particulate?

Back

Preview of the front of card 4

Card 5

Front

What is a percentage yield?

Back

Preview of the front of card 5
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