Hardness of water

What is hardness of water & what causes it.

Answer #1

what they said ^ magnesium and calcium ions, sometimes you find bicarbonates and sulfates you find Ca in the water through limestone or chalk or other mineral compounds

Answer #2

water “hardness” is caused by its mineral content. Water with a lot of dissolved minerals is called “hard” where water with little dissolved minerals is called “soft.”

Answer #3

hmm someone have a problem with the answers?

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Hardness of water

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