Question

Why Copper Chloride is written as 3CuCl2. Why not CuCl2 ?

Answer 1

Answer:

Rust is iron oxide; you have no iron in the system so it is not rust.

The brown substance is copper dust produced by the reaction 2Al + 3CuCl2 -> 3Cu + 2AlCl3.

The aluminium chloride then hydrolyses to give AlCl3 hexahydrate which is colourless and acidic .

Answer 2

Answer:

to make the made compound which is 3CuCl2 balanced

3Cu + 2Cl ---- 3CuCl2