Hardness of water

Article no. P7155201 | Type: Experiments

10 Minutes
10 Minutes
grades 5-7
Pupils
easy
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Also part of:

Student set Substances in everyday usedigital, TESS beginner Sciences

Article no. 15234-88D | Type: Set

Student set Substances in everyday use, TESS beginner Sciences

Article no. 15234-88 | Type: Set

Delivery time: 4-8 weeks

Principle

Drinking water can be classified according to the fraction of (above all) calcium and magnesium salts into hard and soft water. On heating, lime (calcareous fur) precipitates out of hard water. Calcium soap is redissolved by water softening agents.

Benefits

  • Experiment guides are very easy to understand, especially for younger students
  • Associated competences are directly linked to the experiments
  • Curriculum compatible
  • Fit for the future: implementation of tablets possible

 

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