Precipitation of metals by metals (cementation) equilibria in abscence or in presence of complexes in the solution

Cementation equilibria, in presence of the complexing ligands of the L or L° type, have been discussed. Equations expressing dependence of the equilibrium concentration c * A on the process parameters are presented. They indicate that in the cyanide or ammonia complexes solutions, dependently on the reacting metal pair, c * A may rise, decline or remain unchanged - when the concentration of the complexing compound increases. Equilibria concentrations c * A are several ranges of value higher than those c ** A , reached in absence of complexes. Solely in the case of the Ag + /Cu system a reverse dependence may be expected.