Davies equation
empirical extension of Debye–Hückel theory to calculate activity coefficients at higher concentrations
en-US/ˈdeɪviz ɪˈkweɪʒən/
en-GB/deɪvɪz ɪˈkweɪʒən/
empirical extension of Debye–Hückel theory to calculate activity coefficients at higher concentrations