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Water hardness test

Water hardness test

C003/8894

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Credit

MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY

Caption

Water hardness test. Temporary hard water becomes cloudy when boiled, which is what has happened to the water here. Temporarily hard water is caused by dissolved calcium carbonate that precipitates out of solution when the water is boiled. This is in contrast to the calcium and magnesium sulphates or chlorides found in permanently hard water, that are unaffected by boiling.

Release details

Model release not required. Property release not required.

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