Given that there is a counter-transport of 3 moles of A and 5 moles of B in the film between a permeable membrane and the bulk. The film between the membrane and the bulk is 4 microns thick. The concentration of A at the bulk is CA,bulk = 1.5 M and at the interface is CA,i = 5 M. Under steady state conditions, derive the concentration profile (particular solution) of A and B for the following two conditions

(a) Neglecting convective fluxes in the film (b) Not neglecting convective fluxes in the film.