MIXTURES Ch 5 3 PROPERTIES OF MIXTURES A

MIXTURES Ch. 5 - 3

PROPERTIES OF MIXTURES A mixture is a group of two or more substances that are not chemically combined. • Example: Toppings on a pizza, glass of tea, bag of assorted cookies, & air

NO CHEMICAL CHANGES Each substance in the mixture has the same properties it had before. • Mixtures can be physically separated.

DISTILLATION • Distillation is separation through boiling. • Here saltwater is being separated.

MAGNETS • Magnets can be used to separate a mixture of metals. • Some metals, like aluminum, aren’t magnetic.

CENTRIFUGE • A centrifuge separates mixtures by the densities. • Heavy things sink to the bottom and light rise to the top.

Ratio of the Components The substances in a mixture do not have a definite ratio.

Heterogeneous Mixture • The different substances are easy to see. • One doesn’t dissolve into the other.

Homogeneous Mixture • It has the same appearance throughout the mixture. • The tea has dissolved into the water.

SOLUTIONS • A solution is a mixture that appears to be a single substance but is made of two or more substances that are distributed evenly.

Particles in Solutions • The particles in a solution are so small they will not come out of the solution. • They can not be filtered out. • They will not scatter light.

Concentration of Solutions • A measure of the amount of solute dissolved in a given amount of solvent is concentration.

Solubility * Solubility is the ability of one substance to dissolve into another. • It increases as temperature increases. • Like sugar into water

Examples of Solutions Soft drinks are liquid solutions. Air is a solution that is a gas. Steel is a solid solution.

LET’S TRY IT!