I had a similar problem but was quite confused to deal with it. It would be great if you can help me solve it. Please take a look attached file from steps 5 to 9. I'm trying to find "cN and cP" by iteration (It ranges from 0 to tH).
Please help me give a solution for it. Thank you so much.
I am not clear your problem. but I think you should do it as symbolic solution or the equation consist of (cN, cP and tH ) as variables and then apply equilibrium. to do this no need to iteration, in Mathcad prime have build-in function or other methods to solve that.