The model combining Navier-Stokes' equation for barycentric velocity together with Nernst-Planck's equation for concentrations of particular mutually reacting constituents, the heat equation, and the Poisson equation for self-induced quasistatic electric field is formulated and its thermodynamics is discussed. Then, existence of a weak solution to an initial-boundary-value problem for this system is proved in two special cases: zero Reynolds' number and constant temperature.