Mixtures of Matter
A Mixture contains two or more different types of
matter (example – list of ingredients in household items).
A Heterogeneous mixture is made up of different parts
that you can detect quite easily (eg. Concrete).
Sometimes you need a microscope to see the different
parts (eg. Milk).
Homogeneous means that each part of that material is
the same as every other part.
Heterogeneous Mixtures
Concrete is a heterogeneous mixture because it is made up
of different parts that you can detect quite easily.
Sometimes you need a microscope to detect the differences.
Homogeneous
Mixtures
Iced tea is homogeneous because
every part of the material is the same as
every other part.
Pure substances are homogeneous materials (eg. Gold,
helium, pure water, and white sugar).
Heterogeneous materials are always mixtures.
There is such a thing as a Homogeneous mixture.
When you mix sugar with water, the sugar dissolves
and becomes a Homogeneous mixture with water.
These mixtures contain two or more pure substances.
Their properties are blended and every part of the
mixture is now exactly the same.
 Mixtures that are clearly heterogeneous are called Mechanical
mixtures. This means that you can clearly see different types of
matter in this mixture (eg. Pizza).
 A heterogeneous mixture where the
particles eventually settle slowly after
mixing is called a suspension (eg. Oil
and vinegar for a salad).
 Homogeneous mixtures are called solutions. Apple juice, vinegar,
and tap water are all solutions.
 Seawater is a solution of salts and water.
 Air is a solution of nitrogen, oxygen, carbon dioxide and other
gases.
 Solutions that are made from two or more metals are called alloys.
 When you mix two substances and one dissolves in the other, it
forms a solution.
 The solute is the substance that dissolves
 The solvent is the substance in which the solute dissolves.
 When you mix salt and water, the salt is the solute and the water is
the solvent.
Salt
(Solute)
+
Water
(Solvent)
=
Salt Water
(Solution)