Question

What is the formula for copper $\left( {II} \right)$ carbonate?

Answer 1

Copper $\left( {II} \right)$ carbonate is a chemical compound which is an ionic solid at ambient temperatures. It consists of copper $\left( {II} \right)$ cations $C{u^{2 + }}$ and carbonate anions $CO_3^{2 - }$ . Copper $\left( {II} \right)$ carbonate is a grey coloured ionic solid. It is a non-flammable compound.

Complete Step By Step Answer:
Copper $\left( {II} \right)$ carbonate is rarely confronted because it is very strenuous to prepare and reacts with water moisture of the air very rapidly. The terms “Copper carbonate”, “Copper $\left( {II} \right)$ carbonate” and “cupric carbonate” are referring to the basic copper carbonate.
The structure of Copper $\left( {II} \right)$ carbonate is shown in the figure below:

The Copper $\left( {II} \right)$ carbonate reacts very rapidly with water and air thus it is practically a monotonous process to prepare.
Copper $\left( {II} \right)$ carbonate can be yield by the reaction of copper $\left( {II} \right)$ sulphate $CuS{O_4}$ and sodium carbonate $N{a_2}C{O_3}$ in ambient condition, produce instead a basic carbonate and $C{O_2}$ , because of the great affinity of the $C{u^{2 + }}$ ion for the hydroxide anion $O{H^ - }$ .
W.F.T Pistorius in $1960$ ; asserted synthesis by heating basic copper carbonate at ${180^ \circ }C$ in the atmosphere of carbon dioxide and water for $36$ hours. The proportions of the products were malachite $C{u_2}C{O_3}{\left( {OH} \right)_2}$ , but small amount of rhombohedral substance was also formed, claimed $CuC{O_3}$ . But this synthesis was apparently not reproduced.
The chemical formula of Copper $\left( {II} \right)$ carbonate is $CuC{O_3}$ which contain Copper $\left( {II} \right)$ cation $C{u^{2 + }}$ and carbonate anion $CO_3^{2 - }$ .

Note:
The stability of dry carbon $\left( {II} \right)$ carbonate depends upon the partial pressure of carbon dioxide $C{O_2}$ . It is stable for months in dry air however slowly decomposes into copper $\left( {II} \right)$ oxide and carbon dioxide.