hard water

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hard water

- That which contains large amounts of minerals.
See also related terms for minerals.

Hard water

Water that contains an appreciable amount of dissolved salts of calcium and magnesium. Such salts interfere with the action of soap. In the early days of the twentieth century, most rural water came from wells, and most of it was hard. Indeed, in some places, it was reputed to be so hard that a rock dropped into the well would bounce when it hit the water. Slight amounts of dissolved material in drinking water were often preferred because of the taste, but soft water was preferred for washing hair and clothes.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hard water - water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap
H2O, water - binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
soft water - water that is not hard (does not contain mineral salts that interfere with the formation of lather with soap)
References in periodicals archive ?
The possibility of the disease to be associated with water supplied to the cattle was discarded since the total hardness of water was in the concentration of 35.
However in practice the hardness of water sample is usually taken as a measure of its Ca and Mg contents [2].
There are many ways to express hardness of water, e.
Tenders are invited for Supply Of Total Hardness Test Kit For The Measurement Of Hardness Of Water
The total hardness of water is produced by the calcium and magnesium salts contained therein.
A minor contribution to the total hardness of water is made by polyvalent ions as zinc, manganese, aluminum, strontium, barium, and irons.
The hardness of water is defined as the concentration of divalent cations, mainly calcium and magnesium, expressed as CaC[O.
The liming effects on the total hardness of water varied depending on the salts used.
Reducing the hardness of water may increase its ability to remove bacteria from the skin of broiler chickens.