In fact, basic copper carbonate does not exist in wat […]
In fact, basic copper carbonate does not exist in water, because the degree of hydrolysis of basic copper carbonate is very large, and the hydrolysis produces copper hydroxide and water. Basic copper carbonate can also combine with the hydrolyzed copper hydroxide to form basic copper carbonate. Therefore, in the solution, there is no basic copper carbonate, but in the form of copper hydroxide and a small amount of basic copper carbonate. Therefore, this solution is blue with a small amount of green precipitation.
Basic copper carbonate is a blue precipitate. There is no basic copper carbonate in the actual aqueous solution, and the basic copper carbonate is immediately double hydrolyzed into a mixture of copper hydroxide and basic copper carbonate (the specific product depends on the pH of the solution).
Basic copper carbonate is unstable in aqueous solution. There are many ways to test hydroxide ions, not necessarily copper ions. In addition, you only need to remember that copper hydroxide is a blue precipitate in the middle school stage.
Basic copper carbonate is a blue-green copper salt. It is hardly soluble in water and does not react with water. So far, pure basic copper carbonate has not been produced, and only a mixture of CuCO32H2O and Cu(NH3)2CO3 has been synthesized.