The solubility in the Ni(HCOO)(2)-Ca(HCOO)(2)-H2O system was studied at 25
degreesC in a wide range of component concentrations. The solubilities in t
he Ni(HCOO)(2)-M(HCOO)(2)-H2O systems, where M is Ca, Sr, or Ba, at 25 degr
eesC were compared and mutual salting-out effect of the components was cons
idered.