Separating Mixtures: Key Concepts and Techniques

What is a mixture?

• A combination of two or more substances that are chemically combined.

• A combination of two or more substances that are not chemically combined.

• A single substance with uniform properties.

• A substance that cannot be separated by physical means.

Why can mixtures be separated by physical means?

• Because the substances in a mixture are chemically bonded.

• Because the substances in a mixture retain their original properties.

• Because the substances in a mixture form a new compound.

• Because the substances in a mixture lose their original properties.

Which of the following metals is magnetic?

• Aluminum

• Nickel

• Silver

• Gold

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What method can be used to separate large particles in a mixture?

• Distillation

• Hand separation

• Filtration

• Chromatography

What is filtration used for?

• Separating dissolved substances from a liquid

• Separating liquids with different boiling points

• Separating a solid from a fluid using a filter

• Separating magnetic metals from non-magnetic metals

What is an example of a filter used in everyday life?

• A magnet

• A sieve

• A chromatography paper

• A coffee filter

Why is sifting used in baking?

• To dissolve sugar in water

• To remove large clumps from dry ingredients

• To separate different colors of ink

• To separate liquids from solids

How can you separate sugar from sand?

• Dissolving sugar in water and filtering out the sand

• Using hand separation

• Using chromatography

• Using a magnet

What is chromatography used for?

• Separating liquids with different boiling points

• Separating magnetic metals from non-magnetic metals

• Separating dissolved substances based on their attraction to a solvent

• Separating large particles from a mixture

What is the principle behind distillation?

• Separating liquids based on their different boiling points

• Separating solids from fluids using a filter

• Separating substances based on their magnetic properties

• Separating substances based on their solubility in water