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

Example Sentences

See Examples For:

tungstic acid

“Now,” he said, when the tungstic acid had been dissolved, and he had dropped a small bar of tin into the solution.

From Shadow Mountain by Coolidge, Dane

Any silica present will be left undissolved; it should be separated and weighed, and its weight deducted from that of the tungstic acid found.

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

On treatment with hydrochloric acid or aqua regia they are decomposed; the yellow tungstic acid separates and remains insoluble.

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

For the assay of minerals containing tungsten these reactions are only occasionally taken advantage of for testing or purifying the separated tungstic acid.

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

The residual tungstic acid is fixed, so that when the ammonia has been driven off it may be strongly heated without loss.

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