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 degrees type, have been discussed. Equations expressing dependence of the equilibrium concentration c(A)* on the process parameters are presented. T hey indicate that in the cyanide or ammonia complexes solutions, dependentl y 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 tho se c(A)**, reached in absence of complexes. Solely in the case of the Ag+/C u system a reverse dependence may be expected.