cobaltous

[ koh-bawl-tuhs ]

adjective

1. containing bivalent cobalt.

cobaltous

/ kəʊˈbɔːltəs /

adjective

1. of or containing cobalt in the divalent state

Word History and Origins

Origin of cobaltous¹

First recorded in 1860–65; cobalt + -ous

Example Sentences

Bromine water is a convenient agent for oxidizing cobaltous to cobaltic ions (see Chapter XV).

From Project Gutenberg

Cobaltous hydroxide, Co(OH)2, is formed when a cobaltous salt is precipitated by caustic potash in the absence of air.

From Project Gutenberg

It is readily soluble in warm dilute mineral acids forming cobaltous salts.

From Project Gutenberg

It dissolves in acids forming cobaltous salts, and on exposure to air it rapidly absorbs oxygen, turning brown in colour.

From Project Gutenberg

For the action of ammonia on the cobaltous salts in the presence of air see Cobaltammines (below).

From Project Gutenberg