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

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

Coolidge succeeded in accomplishing the feat in 1912 by reducing the tungstic acid by hydrogen and molding the metallic powder into a bar by pressure.

From Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries by Slosson, Edwin E.

Alloys containing tungsten leave tungstic acid after treatment with nitric acid or aqua regia.

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

This solution gives with hydrochloric acid a white precipitate of tungstic acid, which becomes yellow on boiling, but the separation is not complete.

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

The tungstic acid is dissolved, and separated as ammonic tungstate, and, after evaporation, is gently ignited, the heat being increased towards the end.

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