6.6B Pure Substances and Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means.

Front

Can mixtures be separated by physical methods?

Back

TRUE

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is one that does not have a uniform composition, such as a salad.

Front

What separation technique should be used to separate salt from water?

Back

Evaporation.

Front

What is filtration?

Back

Filtration is a separation technique used to separate solids from liquids or gases using a filter.

Front

What is chromatography?

Back

Chromatography is a technique used to separate mixtures based on the different rates at which components move through a medium.

Front

What is an example of a homogeneous mixture?

Back

Coloured water.

Front

What is an example of a heterogeneous mixture?

Back

A salad.