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

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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?