Solutions Other Mixtures Section 6 1 Objectives Distinguish

Solutions & Other Mixtures Section 6. 1

Objectives • Distinguish between homogenous mixtures and heterogenous mixtures. • Compare & contrast the properties of solutions, colloids, and suspensions. • Identify ways to separate different kinds of mixtures.

Heterogeneous Mixtures • A __________ mixture is not the same throughout. • Every sample of a heterogeneous mixture will have a _______ composition • Example: fruit salad, dirt

Heterogenous Mixtures • Particles in a suspension are large and ____________________ • ________ is a mixture that looks uniform when stirred or shaken, but separates when not agitated. • Suspensions are __________ mixtures • Parts in a suspension are usually large enough to be filtered out • Example: _________

Heterogenous Mixtures • Particles in a _____ are smaller and do not settle out • Particles stay _______ throughout the mixture • Examples • • • Liquid/solid – egg whites, paint, blood Gas/liquid – whipped cream Gas/solid – marshmallows Liquid/gas – fog Solid/gas – smoke

Heterogenous Mixtures • Heterogenous liquid-liquid mixtures • Two immiscible liquids will separate. • The less dense liquid will be on top. • They can be separated. • _________ liquids can mix in emulsions • Emulsions have particles so small that they may appear to be uniform • ______ (usually a protein) cover the lipids to keep them from joining together and separating from the mixture.

Homogenous Mixtures • ________ mixtures not only look uniform, they are uniform • Example: ____________– particles are too small to be seen • Salt and water are not reacting, so they can be separated

Homogenous Mixtures • Solutions are ________ mixtures • One substance dissolves in another to form a _______ • The substance dissolving is the _______. • The substance in which the other dissolves is the ______. • Examples: salt water, vinegar, SCUBA air tank

Homogenous Mixtures • ______ liquids mix to form solutions • Two or more liquids that form a single layer when mixed are miscible. • Miscible solutions are _______to separate. • Distillation is used to separate miscible solutions • _______ works when boiling points of mixed substances are different • Examples • Water – boiling point is 100 degrees C • Alcohol – boiling point is 64. 5 degrees C • Alcohol boils first, so it vaporizes and can be collected with very little water in it.

Homogenous Mixtures • If the substances have similar boiling points, it is more difficult, but can be done with ___________.