Term
What is a solvent?
[Level 3] |
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Definition
The liquid that dissolves things
[Level 3] |
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Term
What is a solute?
[Level 3] |
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Definition
The solid that gets dissolved
[Level 3] |
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Term
When a saturated solution is evaporated slowly, what happens to the solute?
[Level 4] |
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Definition
The solute crystallises, becomes solid again
[level 4] |
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Term
Why can't you separate a solution by filtering?
[Level 3] |
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Definition
The dissolved solid is in such small bits that it goes through the filer paper.
[Level 3] |
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Term
What is a saturated solution?
[Level 4] |
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Definition
A solution that can't dissolve any more solid (solute).
[Level 4] |
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Term
What is the scientific name for table salt?
[Level 4] |
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Definition
Sodium chloride.
[Level 4] |
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Term
How can salty sea water be made into fresh water?
[Level 4] |
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Definition
By distillation.
[Level 4] |
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Term
What is the common name for Sodium chloride?
[Level 4] |
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Definition
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Term
What is chromatography used for?
[Level 4] |
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Definition
To separate mixtures.
[Level 4] |
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Term
Explain what is meant by 'distillation'.
[Level 4] |
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Definition
Boiling and condensing.
[Level 4] |
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Term
Explain what happens to the particles of a liquid when it boils.
[Level 4] |
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Definition
They separate from the liquid and join the air.
[Level 4] |
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Term
Explain why ice does not exist above 0°C.
[Level 5] |
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Definition
The ice structure breaks down and melts.
[Level 5] |
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Term
If a mixture of alcohol and water is boiled, which substance vaporises and which is left behind?
[Level 5] |
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Definition
Alcohol vaporises first.
[Level 5] |
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Term
What happens to the solubility of a substance as the temperature of a solution rises?
[Level 5] |
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Definition
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Term
A scientist wants to separate the dyes in a fruit squash. Which method should be use?
[Level 4] |
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Definition
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Term
In some countries drinking water is made from sea water. Which method should be used?
[Level 4] |
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Definition
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