Lesson: Separating Mixtures
VOCABULARY
Condenser
- apparatus used to separate mixtures of liquid
Filter Paper
- a paper placed in filter funnel and used
to separate a solid from a liquid
Filter funnel
- apparatus used for separating a solid from a
liquid
Conical Flask
- class container shaped like a cone.
READ AND UNDERSTAND
Separating Mixtures
 Evaporation - is a process of separating solid and liquid mixtures.
 Sedimentation and Decantation - sedimentation is a process that allows the sediments
(solid particles) to settle at the bottom of the container while decantation is a way of
carefully pouring the liquid into another container after the particles have settled.
 Filtration - is the process of separating solid components (residue) from liquid
components (filtrate) using a filter paper or any filtering medium.
 Distillation -is the process of separating mixtures whose components have a big
difference in the boiling points.
 Magnet Separation -separating mixtures of two solids with one part having the magnetic
properties. -separating iron filings from sand using a magnet.
 Sublimation -used to separate components of a solid mixture. It is used in the heating
mixture.
 Example of Separating Mixtures:
1. Copper Sulfate and Water - The evaporating dish contains
a mixture of water and copper sulfate. If it is left in a warm
room, the water evaporates and leaves the copper sulfate
behind in the dish.
2. Food Dye and Water - A mixture of food dye and water can be separated by using
a piece of apparatus called a condenser. It is used to separate mixtures of two
liquids. The water and food dye mixture are heated and boils. The liquid water
reaches the temperature where it changes state and becomes a gas. Water that is
in the gas state is called steam when it has been formed by boiling the water. The
gas travels along the tube into the condenser. The cold water that is circulating
around the outside of the condenser cools the gas down. This makes the gas
condense back into liquid water. The liquid water collects in the beaker. The food
dye remains in the heated container. The food dye and water have different
properties that allow you to separate them – they have different boiling points.
QUICK CHECK!
Answer the following questions.
1. What is filtration?
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2. What do you think you should do to separate small rocks and water?
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3. Can you separate salt and water without using any apparatus? Explain your answer.
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