tungstic acid

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.

tungstic acid

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 )

Word History and Origins

Origin of tungstic acid¹

First recorded in 1790–1800

Example Sentences

Tungstic acid may be got into solution after fusion with alkalies or alkaline carbonates.

From Project Gutenberg

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

From Project Gutenberg

It is weighed when cold, and is the trioxide or "tungstic acid" (WO3), which contains 79.31 per cent.

From Project Gutenberg

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

From Project Gutenberg

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

From Project Gutenberg