Surface tension and viscosity for water + alkali metals (Li, Na, K) were separately measured over their entire composition range at 298.15, 303.15 and 308.15 K. Viscosities and apparent molal volumes were used to calculate activation viscous flow energy and entropy changes. Limiting surface tension and viscosity values obtained by fitting Redlich–Kister equation depict stronger ion–water interaction (IWI) than the interactions of water molecules themselves. Viscosity B coefficient obtained from Jones–Dole equation inferred solute impact on solvent structure and the size of ionic hydration. Ion–ion, ion–dipolar, solute–solvent and intermolecular interactions structurally affected the properties of solvent depicted from magnitudes of surface tension and viscosity. The physicochemical data scientifically and quantitatively inferred water + alkali metal phosphates interactions. For instance with K₃PO₄ and K₂HPO₄ the increase in surface tension has been noticed 1.18 and 2.26% respectively, depending on their structural interactions. Surface tension and viscosity both have been synergized, and an Ameta-Singh-Interaction-Analysis-Model (ASIAM) for physicochemical properties has been proposed to distinguish interaction pattern and a role of secondary cohesivity in developing dominance over primary cohesivity in interactochemistry of solutions.