Consider a binary solution of A and $B$ with the concentration of $x_A=0\mathrm{.}1.$ Assuming the Henry activity coefficient $({}_A)$ of $A$ in this binary solution is given by $ln{}_A=2x_A{x}_B^2$

Determine the ratio of the chemical diffusion coefficient of $A$ to the tracer diffusion coefficient of $A$ in the solution.