3. Water

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What happens to hard water when soap is added to it?
The dissolved ions react with the soap creating an insoluble compound called scum
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Why is hard more more expensive to use?
It doesn't lather so more soap is needed, it creates scale when boiled which block up pipes
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How is water made hard?
the water runs over certain types of rock (Limestone and chalk) and the ions dissolve into the water (Magnesium and calcium)
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Out of Boiling, adding washing soda and ion exchange columns is permanent hard water softened?
Adding washing soda and ion exchanging columns
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What is the experiment called for testing the hardness of water?
Titration
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Explain Titration:
Add and record soap into different water samples until lather s formed, repeat after clean water from each sample has boiled
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What results should be expected from titration?
soft water- little soap needed to produce a lather and after boiling, temporary hard water - little soap need to produce lather after water was boiled, permanent hard water- lots of soap needed before and after water was boiled
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Explain the cleaning processes of water:
Mesh screen- removes bog objects, chemical - make microbes and solids clump together then fall to the floor, filtration - filters all the clumps created in the step before, chlorination - kills are harmful microbes which are left
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Why is pure water expensive to produce?
Because it would need a lot of energy to heat up all that water
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Dis/advantage of adding fluorine to water?
Helps reduce tooth decay, can cause cancer and bone problems
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Dis/advantage to adding chlorine to water?
Prevents disease, can cause cancers
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Other cards in this set

Card 2

Front

Why is hard more more expensive to use?

Back

It doesn't lather so more soap is needed, it creates scale when boiled which block up pipes

Card 3

Front

How is water made hard?

Back

Preview of the front of card 3

Card 4

Front

Out of Boiling, adding washing soda and ion exchange columns is permanent hard water softened?

Back

Preview of the front of card 4

Card 5

Front

What is the experiment called for testing the hardness of water?

Back

Preview of the front of card 5
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