Mixtures - Topic 1 Flashcards
Define mixture.
Mixtures
Substances made of two or more types of atoms NOT chemically bonded together.
When substances combine in a mixture do their chemical properties change?
Mixtures
No
What is a pure substance?
Mixtures
A single element or compound.
How can you check if a substance is pure?
Mixtures
Melt it:
· If the melting point is lower than a pure substance, it is impure.
· If the substance melts over a range of temperatures, it is impure.
What process describes a solid turning into a liquid?
Mixtures
Melting
What process describes a gas turning into a liquid?
Mixtures
Condensation
What process describes a liquid turning into a solid?
Mixtures
Freezing
What process describes a liquid turning into a gas?
Mixtures
Evaporation
Bromine is a melting point of -7oC and a boiling point of 59oC. What is its state at 25oC
Mixtures
Liquid
The melting point of caesium is 28.5oC and the boiling point is 671oC. What is its state at 25oC?
Mixtures
Solid
Define soluble.
Mixtures
Can dissolve
Define insoluble.
Mixtures
Cannot dissolve
Define solute.
Mixtures
A solid which can dissolve.
Define solvent.
Mixtures
A liquid in which a solid will dissolve.
Define solution.
Mixtures
A mixture of a dissolved solute and solvent.
