8440646
Water! (Chemistry C3)
- How do you soften water?
- Temporary hard water can be
softened by boiling. Permanent
hard water is softened by using
washing soda or an ion exchange
column.
- Temporary hard water can be
softened by boiling. Permanent
hard water is softened by using
washing soda or an ion exchange
column.
- Explain how an ion exchange
column works!
- The column contains sodium ions which
are positively charged. The calcium and
magnesium ions have a greater charge.
Therefore they displace the sodium ions.
The sodium is soluable and will dissolve in
the water. This means the hard water will
now be soft.
- The column contains sodium ions which
are positively charged. The calcium and
magnesium ions have a greater charge.
Therefore they displace the sodium ions.
The sodium is soluable and will dissolve in
the water. This means the hard water will
now be soft.
- Advantages of hard water!
- 1) CA2+ ions in the water are good for
the teeth and bones. 2)Studies show
that people who live in a hard water
area have a lower risk of developing
heart disease.
- 1) CA2+ ions in the water are good for
the teeth and bones. 2)Studies show
that people who live in a hard water
area have a lower risk of developing
heart disease.
- What causes hardness?
- Water hardness is caused by the
CA2+ and MG2+ ions in the water. This
comes from the rocks and mountains
that the rain lands on.
- Water hardness is caused by the
CA2+ and MG2+ ions in the water. This
comes from the rocks and mountains
that the rain lands on.
- what are the two types of hardness?
- temporary and permanent.
- temporary and permanent.
- What are the differences between the two?
- Permanent contains: magnesium
sulphate and calcium sulphate ions.
temporary contains: magnesium
hydrogen carbonate and calcium
hydrogen carbonate ions.
- Permanent contains: magnesium
sulphate and calcium sulphate ions.
temporary contains: magnesium
hydrogen carbonate and calcium
hydrogen carbonate ions.
- Describe the creation of temporary hard water!
- co2 in the air and clouds rains onto limestone rocks
and mountains. Forming CA2+ and creating calcium
hydrogen carbonate.
- co2 in the air and clouds rains onto limestone rocks
and mountains. Forming CA2+ and creating calcium
hydrogen carbonate.
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