HARD WATER • E-FREE TRANSLATION.COM • Definition of Hard water

Add this Dictionary
to your website!
See more options...

/hɑrd wˈɔtər/ Listen

Hard water

noun

Water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap.

See more definitions of Hard water...

See images of 'Hard water'

Antonyms of 'Hard water'

Etymology of 'Hard water'

Share |

"Hard water" Quotes from Famous Books

... your clothes in dirty water. Bathing in water containing much alkali (hard water) or fine sand or mud will make the skin smart or chafe easily and ...

— Manual of Military Training - Second, Revised Edition • James A. Moss

... contain a great deal of gypsum, or natural sulphate of lime, and this is soluble to some extent in water. Water thus hardened is not affected by boiling, or the addition of lime, and is therefore termed permanently hard water, the water hardened with dissolved chalk being termed temporarily hard water. I have said nothing of solid or undissolved impurities in water, which are said to be in suspension, for the separation of these is a merely mechanical matter ...

— The Chemistry of Hat Manufacturing - Lectures Delivered Before the Hat Manufacturers' Association • Watson Smith

... and that one could never have appendicitis if such seeds were not swallowed. This theory is to-day almost forgotten, and one eminent surgeon has asserted that the prevalence of this disease in a district depends on the calcium in the soil, since it is to that mineral that hard water is due, although this has not been substantiated. No information is to-day available by which the fitness of a soil for securing sanitary conditions of building ...

— Rural Hygiene • Henry N. Ogden

... extent in sea-water, but many of them in extremely minute quantities. Sodium and magnesium salts are the two most abundant, and the bitter taste is due to MgSO4 and MgCl2. A liter of sea- water, nearly 1000 g., holds over 37 g. of various salts, 29 of which are NaCl. See Hard Water. ...

— An Introduction to Chemical Science • R.P. Williams

... occasion some short time ago to examine a hard water which owed half its hardness to salts of magnesium, I noticed that the soap test, applied in the usual way, gave a result which differed very much from that obtained by the quantitative estimation of calcium and magnesium. A perfectly normal lather ...

— Scientific American Supplement, No. 441, June 14, 1884. • Various