Pure substances and mixtures replacement

Pure or mixture?

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ScheikundeMiddelbare schoolhavo, vwoLeerjaar 3

This lesson contains 10 slides, with text slides.

Lesson duration is: 50 min

Items in this lesson

Pure or mixture?

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Activating prior knowledge

Last year we've discussed substances.

How can you identify a substance?

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Which substance properties are there?

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Notes, copy in your notebook.

A pure substance is a substance with only one type of molecule

A mixture is a substance with multiple types of molecules.

Each substance is identifiable by its properties.

Guess the word(s)

Slide 4 - Slide

Three phases

A substance is encountered in daily life in one of the three phases.

either it is: Solid, Liquid or Gaseous.

somtimes we also use substances dissolved in water

Guess the word(s)

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Points and ranges

If you have a mixture, it has substance properties of both materials. It no longer has a set boiling temperature (point) or melting temperature (point) but it now has a range of boiling and melting temperature. You can use this to see if a substance is a pure substance or mixture.

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Now go and read paragraph 1.2

Do exercises: 15, 17, 19, 20, 21, 22, 24, 25, 26, 29, 30

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Application/Outcome

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End Slide

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