The comprehensive topological isomorphism of liquid–vapor, fusibility, and solubility diagrams in the proper sets variables is proven with aid van der Waals equations shift phase equilibrium. Analogues Gibbs–Konovalov Gibbs–Roozeboom laws are demonstrated ternary quaternary systems under crystallization different types solid solutions. For demonstration, reciprocal system K+,NH4+||Cl−,Br−−H2O i...