On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green. (a) Predict the new compound formed which imparts a blue-green colour to solution. (b) Write a balanced chemical equation of the reaction which takes place. (c) On the basis of the above reactio...
CuCl2 is formed when copper(II) oxide, CuO, is treated with hydrochloric acid, HCl: CuO + 2HCI→CuCl2 + H2O. The anhydrous form constitutes yellow to brown monoclinic crystals. It is hygroscopic; forms dihydrate on exposure to moist air; density 3.40 g/cm3; melts around 630°C with ...
Reduced graphene oxide 1. Introduction In the last decades, the reduction of water reserves has become a severe problem. This is partly due to their overexploitation and their contamination with different substances over the years [1]. Among these pollutants, emerging contaminants (ECs), such as ...
The most important compounds are the oxide and the sulfate, blue vitriol; the latter has wide use as an agricultural poison and as an algicide in water purification. Copper compounds such as Fehling’s solution are widely used in analytical chemistry in tests for sugar. High-purity copper (...
The slight change of potential at the beginning of immersion may be attributed to the formation of an adsorbed film and thin Cu(I)oxide on the freshly polished copper. The presence of [C10Nic]Br inhibitor influences the corrosion potential (Ecorr), which shifts toward the cathodic direction. ...
A new conducting polymer of the cellulose acetate poly acrylonitrile (CAPA)–SiC composite was produced using an in situ oxidative polymerization technique in an aqueous medium. SiC was synthesized from Cinachyrella sp. as a source of carbon and silicon
The good performance of CaO can be explained by its double role, namely the provision of electrons for dioxins dechlorination and carbonization, as well as the subtraction of chlorine from the reaction mixture by CaCl2formation38,50. Ikomaet al.51proposed that during milling the oxide centres of...
[9], banana pith [10], cottonseed hulls [11], apple wastes [12], sugarcane bagasse pith[13], peanut hull carbon [14], activated carbons obtained from agricultural by-products [15] and Mn-oxide coated granular activated carbon [16] for the removal of copper and cadmium from water and ...
and stability of surface films of copper oxide and copper chloride1. At sufficiently low pH, copper dissolution is accompanied by hydrogen evolution, and with increasing chloride concentration—the stability of the solid phase CuCl2·3Cu(OH)2increases compared to Cu2O and CuO3. At potentials close...
Hydrolysis is pH dependent, so are the solubility and stability of surface films of copper oxide and copper chloride1. At sufficiently low pH, copper dissolution is accom- panied by hydrogen evolution, and with increasing chloride concentration—the stability of the solid phase CuCl2·3Cu(OH)2...