from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or containing univalent copper.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or of the nature of copper.
- adj. Containing copper with an oxidation number of 1.
from the GNU version of the Collaborative International Dictionary of English
- adj. Of, pertaining to, or derived from, copper; containing copper; -- said of those compounds of copper in which this element is present in its highest proportion.
from The Century Dictionary and Cyclopedia
- Same as cupric.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of or containing divalent copper
Boiling with nitric acid converts the lower into the higher oxide; and powerful reducing-agents, such as cuprous chloride, have the opposite effect.
Berkeley used to have an experiment in which Chem 1 students prepared cuprous sulfide and determined its stoichiometry ratio of Cu:S.
In the first place, it was found that, because of the reducing action of metallic copper on cupric sulphate to form cuprous sulphate, too little copper was deposited in the copper coulometer to correspond to the current.
He continued on into the field of rectification and photo-effects at semiconductor surfaces, beginning with a study of rectification at the surface of cuprous oxide.
His solution differs from that of Fehling in containing ammonia, which dissolves the cuprous oxide as soon as it is formed, yielding a colorless solution.
Yellow to brick-red cuprous oxide forms as a heavy precipitate if glucose is present.
When so altered, the solution will yield a more or less copious precipitate of cuprous oxide on merely boiling, and quite independent of the presence of glucose.
The photo-electric action of light belongs principally to the "chemically active" rays; this is shown by the fact that the production of electricity is extremely small behind a glass colored with cuprous oxide, and behind a film of a solution of quinine sulphate; while it is not appreciably diminished by a film of a solution of alum.
~ Copper, like iron, forms two series of compounds: in the cuprous compounds it is univalent; in the cupric it is divalent.
~ Silver forms two oxides but only one series of salts, namely, the one which corresponds to the mercurous and cuprous series.