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What is meant by hard water?

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Anonymous

14y ago
Updated: 8/17/2019

water that has run over chalk and still has these types of particles in. When mixed with soap solution forms a scum. However, soft water when mixed with soap solution forms a precipitate.

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Water containing some soluble hydrocarbonates of calcium and magnesium as Ca(HCO3)2 and Mg(HCO3)2 - temporary hard water

or

Water containing another salts of calcium and magnesium (as chlorides, sulfates, nitates) - permanent hard water

Total hardness is the sum of temporary and permanent.

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Wiki User

14y ago

What else can I help you with?