MIXTURES AND SOLUTIONS

EXPERIMENT 1

TERMS

Term One: Mixture
When 2 materials are stirred together.

Term Two: Solution
A solution is a special type of mixture, where the solid dissolves in the liquid. It can only be separated by evaporation. It is also transparent.

Term Three: Dissolving
When a solid becomes a liquid, it seems to disappear inside the liquid. It becomes one with the liquid.

Term Four: Evaporation
It Separates the solution. Then the liquid forms into a gas into the air and leaves the solid behind.

INFO

INFO

• Two or more materials make a mixture.
• Some mixtures can be separated with a screen, a paper filter, and evaporation.
• When a solution evaporates, it leaves the solid material behind.
• If the evaporation material forms a crystal, it can be identified by its properties such as pattern and size.

EXPIREMENT 2

TERMS

SOLVENT

SOLUTE

SATURATED SOLUTION

Solubility:
How well a solid dissolves in a liquid. The more that can dissolve, the higher the solubility.

INFO

INFO

• Salt will dissolve in water until it reaches saturation. No more salt will dissolve once saturation is reached.
• The amount of salt in a saturated solution can be determined by weighing the saturated solution and subtracting the weight of the liquid/solvent
• Citric acid is about 4 times more soluble in water than salt is.
• Some materials form crystals with characteristic shapes that can be used for identification.

INVESTIGATION 3

CONCENTRATION

DILUTE

VOLUME

INFO

• As the amount of solute in a solution increases, the concentration goes up.
• When equal volumes of two solutions are compared on a balance, the heavier one is more concentrated.

THE END