Hint:Metal oxides are usually basic in nature. When they react with acid, products are salt and water. Copper oxide is a weak base. In a neutralization reaction, acid reacts with base to form salt and water. Hydrochloric acid is a strong acid. Complete solution step b...
(a)To 50 cm3 of hydrochloric acid, add excess copper(ll) oxide/copper(ll) carbonate andstir.[1]Continue adding copper(ll) oxidelcopper(Il) carbonate while stirring until no moredissolves.[1]Filter the mixture to obtain copper(ll) chloride as the filtrate.[1]Heat the filtrate until it is...
CuCl2 is an anhydrous, brown solid copper salt which is soluble in water and gives a brownish aqueous solution when concentrated. When diluted, the solution changes its colour to green and then blue. CuCl2 is formed when copper(II) oxide, CuO, is treated with hydrochloric acid, HCl: CuO +...
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 ...
Is copper most likely to be found in nature as an oxide, a sulfide, or a free metal (uncombined)? Explain. Why are alloys produced? Why would magnesium remove tarnish from silver? Zinc reacts with diluted sulfuric acid to give hydrogen but silver doesn't. Explain. ...
Copper(II) oxide dissolves in mineral acids such as hydrochloric acid, sulfuric acid or nitric acid to give the corresponding copper(II) salts:CuO + 2 HNO3 → Cu(NO3)2 + H2O CuO + 2 HCl → CuCl2 + H2O CuO + H2SO4 → CuSO4 + H2OCopper(II) oxide reacts with concentrated alkali to...
Thus, the action of sodium peroxide on a solution of sodium cuprite, Na2CuO2, yields the oxide Cu2O4;a red powder that begins giving up oxygen at temperatures as low as 100°C. Cu2O3 is a strong oxidizing agent (for example, it displaces chlorine from hydrochloric acid). The chemical ...
The copper oxide sludge which has separated out is filtered off and rinsed with about 500 parts by weight of water in portions. The naphthalene-1,4-dicarboxylic acid is precipitated at pH 2 in the filtrate by the addition of about 130 parts by weight of concentrated hydrochloric acid, and ...
Iptes on contact with chlorine, chlorine trifluoride, fluorine (above 121℃), and hydrazinium nitrate (above 70'). Reacts violently with C2H2, bromates, chlorates, iodates, (Cl2 + OF2), dimethyl sulfoxide + trichloroacetic acid, ethylene oxide, H202, hydrazine mononitrate, hydrazoic acid, ...
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...