Approximate solution of the differential equation for the migration of a reversibly reacting substance

A series solution is given for the differential equation describing the transport of a reversibly reacting substance in an infinite rectangular cell. The concentration dependence of the constituent transport coefficients has been approximated by polynomials. The solution converges for short time (t is less than 1 h). Several features of the leading and trailing boundary of monomer-trimer and monomer-dimer-trimer systems are discussed.