cobaltous

[ koh-bawl-tuhs ]

/ koʊˈbɔl təs /

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adjective

containing bivalent cobalt.

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Origin of cobaltous

First recorded in 1860–65; cobalt + -ous

Words nearby cobaltous

cobalt blue, cobalt bomb, cobalt green, cobaltic, cobaltite, cobaltous, cobaltous hydroxide, cobalt violet deep, cobalt violet light, cobalt yellow, Cobb

How to use cobaltous in a sentence

Bromine water is a convenient agent for oxidizing cobaltous to cobaltic ions (see Chapter XV).
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2.|Julius Stieglitz
Cobaltous hydroxide, Co(OH)2, is formed when a cobaltous salt is precipitated by caustic potash in the absence of air.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various
It is readily soluble in warm dilute mineral acids forming cobaltous salts.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various
It dissolves in acids forming cobaltous salts, and on exposure to air it rapidly absorbs oxygen, turning brown in colour.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various

For the action of ammonia on the cobaltous salts in the presence of air see Cobaltammines (below).
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various

British Dictionary definitions for cobaltous

cobaltous

/ (kəʊˈbɔːltəs) /

adjective

of or containing cobalt in the divalent state

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