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temporary hardness

British  

noun

  1. chem hardness of water due to the presence of magnesium and calcium hydrogencarbonates, which can be precipitated as carbonates by boiling

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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If the water contains an appreciable amount of "temporary hardness," and if it becomes heated much in the lamp, fur will be deposited sooner or later, and will obviously give trouble.

From Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power by Leeds, F. H. (Frank Henley)

Most natural waters contain it dissolved in carbonic acid; this confers "temporary hardness" on the water.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" by Various

Similar scales should be arranged for the organic content and the temporary hardness of the water.

From The Home Medical Library, Volume V (of VI) by Winslow, Kenelm

To what is temporary hardness in water due?

From Human Foods and Their Nutritive Value by Snyder, Harry

Such water is called water of temporary hardness.

From An Introduction to Chemical Science by Williams, Rufus Phillips