cobaltous

American  

[koh-bawl-tuhs] / koʊˈbɔl təs /

adjective

1. containing bivalent cobalt.

---

cobaltous British  

/ kəʊˈbɔːltəs /

adjective

1. of or containing cobalt in the divalent state

---

Etymology

Origin of cobaltous

First recorded in 1860–65; cobalt + -ous

Example Sentences

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

Cobalt dioxide, CoO2, has not yet been isolated in the pure state; it is probably formed when iodine and caustic soda are added to a solution of a cobaltous salt.

From Project Gutenberg

The cobaltous salts are formed when the metal, cobaltous oxide, hydroxide or carbonate, are dissolved in acids, or, in the case of the insoluble salts, by precipitation.

From Project Gutenberg

The most common of these sulphides is cobaltous sulphide, CoS, which occurs naturally as syepoorite, and can be artificially prepared by heating cobaltous oxide with sulphur, or by fusing anhydrous cobalt sulphate with barium sulphide and common salt.

From Project Gutenberg