The presence in water of mineral salts (chiefly calcium bicarbonate) that are removed by boiling.
Example sentencesExamples
- There are two types of hardness, resulting from different compounds - permanent and temporary hardness.
- Calcium bicarbonate is called temporary hardness because it will precipitate out of solution.
- The term ‘temporary hardness’ is sometimes used, because the hardness is removed by boiling.
- The water has a lot of temporary hardness from a high level of bicarbonate.
- Temporary hardness can be precipitated and removed by boiling the water.
- Make sure you know how and why temporary hardness is removed.
- When temporary hardness is eliminated by this method, no salts remain.
- The temporary hardness is caused by the magnesium and calcium bound in hydrogen carbonate or carbonate.