Phase Equilibria in System KHCO3–K2CO3–H2O at 25°C

Abstract

Phase equilibria in ternary water–salt system \(\left. {{{\rm{K}}^ + }} \right\|\;{\rm{CO}}_3^{2 - }\), \({\rm{HCO}}_3^ - - {{\rm{H}}_2}{\rm{O}}\) at 25°C were studied by a combination method. A limited solid solution series was found to form; the reasons behind the scatter of the reported compositions of the chemical compound were elucidated. The behavior of the limited solid solution series in response to increasing potassium carbonate concentration in saturated solution was studied.