Water Hardness (starring Lucy Cheng)

Water Hardness (starring Lucy Cheng)


Water hardness is a measure of the number of minerals, especially cations like calcium, present in water. This is often quantified as the total dissolved solids (TDS) and Electrical conductivity (EC) of the water. If hard water has a high content of calcium and bicarbonate, then boiling can help to release carbon dioxide and soften water. Most commonly, water is softened by using a resin based softener which exchanges sodium for calcium and magnesium in the water.

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