Types of Mixtures

Types of MixturesA mixture is a physical blend of two or more

substances.

Their composition varies (Air).

There are two types of mixtures: homogenous and heterogenous

Types of Mixtures Heterogenous mixtures

Is the type of mixture that is not uniform in composition. Has visibily different parts.

Granite, Chocolate Chip Cookies

Types of Mixtures Homogenous mixture Is the type of mixture that has a completely

uniform composition throughout itself. Does not have visibly different parts.

Seawater, Air

Homogenous or Heterogenous?

1. Air2. Salt water3. Tea4. Brass5. Vinegar6. Hydrogen peroxide7. Steel

1. Salad dressing2. Apple3. Sand4. Paint5. Granite6. Laundry detergent7. Cereal

Homogeneous vs. Heterogenous

MixturesCommon Techniques for Separating Mixtures

Distillation – separates a mixture based on boiling points of the component.

Examples :saltwatercrude oil into gasoline and kerosene

Magnet – separates iron from other objects.

Centrifuge – spins and separates according to densities.

SolutionsSolutions are groups of molecules that are

mixed up in a completely even distribution. Hmmm. Not the easiest way to say it.

Scientists say that solutions are homogenous systems.

Soluteis the substance to be dissolved Example: (sugar).

)

SolventThe solvent is the one doing the dissolving Example (water)

SuspensionA mixture in which particles ofa material are dispersed through-out a liquid or gas but are largeenough that they settle out.

Particles are insoluble, so they DO NOT dissolve in the liquid or gas.

Particles can be separated using a filter. Examples: Salad dressing Medicines that say“shake well before use”

ColloidsA mixture in which the particles are

dispersed throughout but are not heavy enough to settle out.

Made up of solids, liquids and gases.Examples :

Mayonnaise Stick deodorant milk