Some copper salt traits.
Alkaline Carbonate: Grass Green Monoclinic Fibrous Clay or Dark Green Powder.
Basic copper sulfate: green monoclinic crystal.
Copper nitrate: blue oblique flake crystal.
Copper sulfate: blue or slightly yellow granular crystals.
Copper chloride: green to blue powder or oblique double cone crystals 
Copper carbonate: green powder, easy to react with water hydration, the formation of basic copper carbonate and copper hydroxide. There is no pure copper carbonate and its preparation method.
Solubility of certain copper salts.
Basic copper carbonate: Water and alcohol insoluble in 35 ° C, soluble in acid, cyanide, ammonia and ammonium
Basic copper sulfate: Soluble in water is very small, soluble in dilute acid and ammonia.
Copper sulfate: soluble in water, soluble in dilute ethanol (ie ethanol low concentration of aqueous solution), insoluble in anhydrous ethanol, liquid ammonia.
Copper chloride: soluble in water, ethanol and methanol, slightly soluble in acetone and ethyl acetate, slightly soluble in ether.
The chemical properties of copper salts are reflected in copper ions. Copper ions can be produced by the reduction reaction of copper, copper can be generated by oxidation reaction of copper ions, copper salt dissolved in water or melting can also get copper ions, copper ions can be generated with hydroxide ions do not dissolve in water Cu (OH) 2 blue Color precipitation, which is one of the methods of testing copper ions. Copper ions are present in alkaline solutions to produce precipitates. Copper ions can be used for antivirus, in the swimming pool can be properly added copper ions, so the swimming pool water is usually blue. 
Copper salt is mainly used for anti-virus, insect repellent.
Copper sulfate can be used for swimming pool disinfection, basic copper sulfate (Bordeaux liquid active ingredients) can be used for plant deworming.
The reaction can be carried out with copper hydroxide with the corresponding acid.
It is possible to replace the salt formed by the elemental copper with a metal (such as silver) that is later than the metal activity sequence of copper.
Copper ions are two electrons that are lost by the outermost layer of copper atoms, are positively charged, written as Cu2 +, usually blue.
, Copper ion Cu2 + in aqueous solution is actually in the form of hydrated ions [Cu (H2O) 4] 2 + in the form of hydrated copper ions were blue, so our common copper salt solution is mostly blue.
In the solution of copper chloride, not only is the hydrated copper ion [Cu (H2O) 4] 2+, and the chloride ion Cl- is combined with copper ions to form tetrachloro copper complex [CuCl4] 2-, The color is yellow. When sodium chloride or other chloride and hydrogen chloride are added to the saturated copper chloride solution, the green color of the solution will be further "yellowed" so that the solution is bright yellowish green and the solution adhering to the white porcelain wall It is yellow, which is related to the physical tension and so on to change the equilibration constant of tetrachromate copper ions, so that the positive move, and in the solution, a large amount of water to tetrachloride copper ion conversion was reversible, and thus can not Make it appear yellow. According to the optical principle we know that the mixed color of blue and yellow is green, which is why our common common concentration of copper chloride solution is green.