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Set 3: Mixtures

Terms in this set (26)

Mixture
a physical blend of two or more substances
Two basic types of mixtures
heterogeneous
homogeneous
Heterogeneous
mixture that is not uniform in composition
Examples of a heterogeneous mixture
pizza
oil and vinegar
blood
Homogeneous
mixture that is uniform in composition
Examples of a homogeneous mixture
ice tea
sterling silver
air
Solution
special name given to homogeneous mixtures by chemists, because they are so important
Phase
any part of a system with uniform composition and properties
Number of phases for a heterogeneous mixture
two or more phases
Number of phases for a solution
only one phase
Ways to separate mixtures
evaporation
filtration
paper chromatography
distillation
centrifuge
separating funnel
using a magnet
decanting
Evaporation
a way to separate a mixture; heating to separate a soluble substance
Example of evaporation
separating table salt from water
Filtration
a way to separate a mixture; separating an insoluble substance from liquid by passing the mixture through porous paper
Example of filtration
separating sand and water
Paper chromatography
a way to separate a mixture; using long strips of filter paper to draw lighter dissolved substances away from heavier dissolved substances
Example of paper chromatography
separating different colored dyes
Distillation
a way to separate a mixture; a combination of two processes- evaporation followed by condensation
Example of distillation
to make pure water from sea water
Centrige
a way to separate mixtures; spinning to separate lighter from heavier substances
Example of centrige
separating blood cells from plasma
Separating funnel
a way to separate a mixture; a device to separate heavy liquids from lighter liquids
Example of separating funnel
separating water from kerosene
Using a magnet
a way to separate a mixture; attracting substances made of iron, nickel, and cobalt in order to separate them from other substances
Decanting
a way of separating a mixture; pouring off the liquid at the top of a container with an insoluble substance
Example of decanting
separating a mixture of sand and water
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