Diffusion of weakly ionized acids such as acetic acid is an interesting and complex problem in diffusion

Diffusion of weakly ionized acids such as acetic acid is an interesting and complex problem in diffusion. The diffusion involves the ionized species CH3COO− as well as the un-ionized acid CH3COOH. The diffusion of acetate ions is affected by H ions due to electroneutrality while that for un-ionized molecules of acetic acid is a constant. Set up a model to compute the flux based on this model. Express the results in terms of the total concentration of acetic acid on one side of a region. The concentration on the other side is zero. What is the dependence of the flux on the concentration?