CHAPTER 9: LESSON 4

How are mixtures formed and separated

MIXTURES A mix of 2 or more substances. Example 1: Salt and sand. Example 2: Salt and water. Example 3: Salad

TYPES OF MIXTURE:

Suspensions Solutions

SUSPENSIONS Type of mixture which over time has

one or more parts that settles to the bottom.

Example 1: Sand in water mixture. Example 2: Orange juice. Example 3: Some medicines.

SOLUTIONS Type of mixture with parts that blends

so that it looks the same everywhere even under the microscope.

Example: Salt in water mixture .

SOLUTIONS

Solutes Solvents

The smaller amount that is dissolved

in a solution.

The larger amount that dissolves the

other substance in a

solution.

Note: Solutions can be made with solids,

liquids and gases. Example: Sugar (solute) in water

(solvent).

SOLUBILITY What is solubility? Amount of solute that can dissolve in a

solvent. Note: Water is a universal solvent. Many substances become more soluble

at higher temperatures.

SEPARATING MIXTURES

Filtration

Evaporation

Magnet Distillation

FILTRATION Using filter paper. Example: Separating sand in water

mixture. Sand Stays in filter

paper. Water passes through.

EVAPORATION Example: Separating sugar in water

mixture. Water Evaporates. Sugar Stays behind.

MAGNET Example: Separating sand in iron

mixture. Iron Attracted. Sand Stays behind.

DISTILLATION Separating mixture of liquids.