Good Science Victorian Curriculum Year 7
Digital sample of Matilda's newest publication, Good Science Victorian Curriculum Year, authored by Emma Craven and Aaron Elias. For more information visit www.matildaeducation.com.au or email Katrina Tucker, katrinatucker@matildaed.com.au
Digital sample of Matilda's newest publication, Good Science Victorian Curriculum Year, authored by Emma Craven and Aaron Elias. For more information visit www.matildaeducation.com.au or email Katrina Tucker, katrinatucker@matildaed.com.au
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CHEMICAL SCIENCES<br />
5.2<br />
SOLUTE,<br />
SOLVENT,<br />
SOLUTION<br />
LEARNING INTENTION<br />
At the end of this lesson I will<br />
be able to describe mixtures<br />
in terms of solute, solvent and<br />
solution.<br />
KEY TERMS<br />
aqueous<br />
containing water<br />
dissolve<br />
to mix a solid into a liquid to form<br />
a mixture called a solution<br />
insoluble<br />
something that does not dissolve<br />
soluble<br />
something that dissolves<br />
solute<br />
a substance that is dissolved<br />
by a solvent<br />
solution<br />
a mixture made up of a solvent<br />
and a dissolved solute<br />
solvent<br />
a substance that dissolves<br />
a solute<br />
1<br />
2<br />
Soft drinks were created as far back as the 1600s! Some<br />
contain many, many ingredients – most of which we are<br />
blissfully unfamiliar with.<br />
It all starts with water, a solvent that can dissolve many<br />
substances. The ingredients of the soft drink – sugar, flavours<br />
and carbon dioxide for fizz – are solutes. They are dissolved<br />
in the mixture, which is a solution.<br />
Solutes dissolve in other substances<br />
A solute is any substance that can dissolve in<br />
another substance (the solvent). Solutes can begin<br />
as any of the three main states of matter:<br />
• solid; for example, sugar, salt and instant coffee<br />
are all solutes that can dissolve in water<br />
• liquid; for example, cordial can dissolve in water<br />
to make a sweet drink<br />
• gas; for example, carbon dioxide can dissolve<br />
in soft drinks, which makes them fizzy.<br />
Substances that dissolve are said to be soluble.<br />
Substances that do not dissolve are said to be<br />
insoluble. A substance that is insoluble in a solvent<br />
such as water might be soluble in a different solvent<br />
such as an acid.<br />
What is a solute?<br />
Solvents dissolve solutes<br />
A solvent is any substance, usually a liquid, that can dissolve another<br />
substance (the solute).<br />
Water is a liquid that can dissolve cordial (another liquid), sugar<br />
(a solid), and fizzy carbon dioxide (a gas) in soft drinks.<br />
What does a solvent do?<br />
LITERACY LINK<br />
VOCABULARY<br />
The words solution, solvent,<br />
solute and dissolve are all<br />
related in meaning and all<br />
contain the letters ‘sol’. Can you<br />
think of another group of words<br />
that are all related and share a<br />
common group of letters?<br />
Figure 5.3 A solution is a solute<br />
dissolved in a solvent.<br />
Solute<br />
(e.g. sugar)<br />
Solvent<br />
(e.g. water)<br />
Sugar begins<br />
to dissolve in<br />
water to form<br />
a solution<br />
70 GOOD SCIENCE VICTORIAN CURRICULUM 7
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