Example image of eyePlorer eyePlorer map for 'Debye–Hückel equation': Activity (chemistry) Activity coefficient Concentration Erich Hückel Peter Debye Interaction energy Ion Ionic strength Charge number Debye length Relative static permittivity Temperature Vacuum permittivity Electrostatics Chemical equilibrium Free variables and bound variables Mole fraction Stoichiometry Free entropy Thermodynamic potential Differential (infinitesimal) Potassium chloride Ideal solution Thermodynamic equilibrium Boltzmann distribution Maxwell–Boltzmann statistics Boltzmann constant Boltzmann factor Number density Charge density Poisson's equation Poisson–Boltzmann equation Superposition principle Helmholtz equation Double layer (interfacial) Spherical coordinate system Point particle Shell theorem Electric potential energy Buckingham π theorem Common logarithm Ångström Hydronium Micelle Surfactant Davies equation Ionic atmosphere DLVO theory Osmotic coefficient Specific ion interaction theory