The difference between Heavy water and Soft water
When used as nouns, heavy water means water containing deuterium instead of normal hydrogen (symbol d2o), whereas soft water means water with a low concentration of dissolved minerals, especially calcium, making it easier to lather with soap.
check bellow for the other definitions of Heavy water and Soft water
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Heavy water as a noun (chemistry):
Water containing deuterium instead of normal hydrogen (symbol D2O); used as a moderator in nuclear reactors.
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Soft water as a noun (chemistry):
Water with a low concentration of dissolved minerals, especially calcium, making it easier to lather with soap.