Science 4 Unit 12 mixing materials

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Unit 12 mixing materials

12.1 mixing materials
Different materials have different properties. Three states of materials: solid, liquid, gas

a. Mixing a solid and liquid materials
No
Mixture
Result
Character
1
Pebbles + water
Does not mix
Doesn’t dissolve, insoluble
2
Sugar + water
Mix completely
Dissolves, soluble, solution
3
Chalk + water
Mix not completely
Dissolve, soluble, not solution.

b. Mixing liquid and liquid materials
No
Mixture
Result
Character
1
Oil + water
Does not mix
Immiscible liquids
2
Fizzy drink + water
Mix completely
Miscible liquid

12.2 solubility of materials

Solubility: the greatest amount of material that can dissolve in a certain amount of liquid at a particular temperature.
The solubility of most materials in a liquid increases as the temperature of the liquid increases.

12.3 rate of solubility

Rate of solubility: the time taken by material to dissolve in a certain amount of liquid.
The rate of solubility is influence by size of solid being dissolved, temperature, stirring.



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