Chemical nature of the ion:
The chemical nature of the ion within solution has a significant influence on the physical form of the deposit. For instance, a pure bright and adherent deposit of copper can be acquired through electrolysing a nitric acid solution of cupric ions. In compare, a coarse tree-like deposit of silver is got under same conditions. The electrolysis from a solution of Ag [CN]-2 complex generates a appropriate deposit. Complex ions exhibit a property called as 'throwing power' - the property of a solution through virtue of that a associative uniform deposit of metal is acquire on irregular surfaces - cyanide and ammonia complexes frequently give the best deposits.
Increase in temperature favours diffusion. But the hydrogen overpotential is reduces and the stability of several complex ions is decreased.
In practice, constant current elecctrolysis is limited to the separation of an simply decreased cation from cations which are more hard to be reduced than hydrogen. Therefore, Cu (II) ion could be deposited from an acid solution.