How does a pure substance melt and boil?
At specific temperatures characteristic of the substance.
AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher · 5.8.1.1
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How does a pure substance melt and boil?
At specific temperatures characteristic of the substance.
How can a measured melting point or boiling point be used to judge a sample’s purity?
Compare it with the known value: a match is consistent with purity; a difference indicates an impure sample or mixture.
What is a pure substance in chemistry?
A substance made of one kind of particle: a single element or compound, with no other substance mixed in.
What type of atoms does a pure element contain?
Only one type of atom.
What does a pure compound contain?
Only one type of chemically bonded substance.
How does chemical purity differ from the everyday meaning of purity?
Chemical purity means being a single substance. Everyday purity can mean natural or having nothing added, even if the material is a mixture.