tungstic acid

American  

noun

Chemistry.

1. a hydrate of tungsten trioxide, H 2 WO 4 ⋅H 2 O, used in the manufacture of tungsten-lamp filaments.

2. any of a group of acids derived from tungsten by the addition of acid to a soluble tungstate or to a mixture of a tungstate and a silicate, phosphate, etc.

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tungstic acid British  

noun

1. any of various oxyacids of tungsten obtained by neutralizing alkaline solutions of tungstates. They are often polymeric substances, typical examples being H 2 WO 4 ( orthotungstic acid ), H 2 W 4 O 13 ( metatungstic acid ), and H 10 W 12 O 14 ( paratungstic acid )

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Etymology

Origin of tungstic acid

First recorded in 1790–1800

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Example Sentences

See Examples For:

tungstic acid

Next followed the discovery of tungstic acid, and in 1783 he added to his list of useful discoveries that of glycerine.

From A History of Science — Volume 4 by Henry Smith Williams

The tungstate of ammonia requires simple evaporation on the water-bath and gentle ignition in order to cause the tungstic acid to be left in an almost pure state; possibly, it may carry a little silica.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Cornelius Beringer

This may be got rid of by boiling in aqua regia, and dissolving out the tungstic acid which has been liberated by means of ammonia.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Cornelius Beringer

It consists of silica with the tungstic acid.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Cornelius Beringer

If the tungstic acid contain iron, the glass becomes blood-red on cooling, similar to titanic acid.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

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