Extend the analysis of a system for transport in a charged membrane to the case of a mixture of two electrolyte salts with a common anion (a mixture of NaCl and KCl, for example)

Extend the analysis of a system for transport in a charged membrane to the case of a mixture of two electrolyte salts with a common anion (a mixture of NaCl and KCl, for example). Derive a formula for the membrane potential when one side of the membrane is exposed to concentrations of C1(0) for KCl, and C2(0) for NaCl while the other side at L is exposed to C1(L) and C2(L). Calculate the potential for a membrane that is 100 μm thick with concentrations of 0.1 M and 0.01 M on either side.