Water (Edexcel GCSE Chemistry Combined Science): Flashcards

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Water
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Anhydrous meaning

Without water

Hydrous meaning

With water

Water of crystallisation

Water chemically bonded to crystal salt structure

What hydrated salts contain

Water molecules in their structure

Potable water meaning

Water that is safe to drink

First stage of water treatment

Filtration - removes large particles

What filtration removes

Large particles like dirt, sand, and gravel

Second stage of water treatment

Sedimentation - solids settle to bottom

Third stage of water treatment

Chlorination - chlorine kills bacteria

Why chlorine is added to water

To kill bacteria and harmful microorganisms

How sedimentation works

Solid particles settle at bottom due to gravity

How to test for pure water

Boil water and observe boiling point

Boiling point of pure water

100°C100°C

What deviation from 100°C100°C indicates

Impurities in the water

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