cerous

[seer-uhs]

adjective

Chemistry.

1. containing trivalent cerium.

cerous

/ ˈsɪərəs /

adjective

1. of or containing cerium in the trivalent state

Word History and Origins

Origin of cerous¹

First recorded in 1860–65; cer(ium) + -ous

Word History and Origins

Origin of cerous¹

C19: from _cerium + _-ous

Example Sentences

Cerium compounds may be recognized by the red precipitate of ceric hydroxide, which is formed when sodium hypochlorite is added to a colourless cerous salt.

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Compounds of cerium with volatile acids yield dioxide on ignition; and this, on solution in hydrochloric acid, yields cerous chloride and chlorine.

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A hydrated chloride of composition 2CeCl3�15H2O is also known, and is obtained when a solution of cerous oxide in hydrochloric acid is evaporated over sulphuric acid.

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Double salts of cerous chloride with stannic chloride, mercuric chloride, and platinic chloride are also known.

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By the addition of caustic soda to cerous salts, a white precipitate of cerous hydroxide is formed.

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