Show the calculations and use the quadratic equation for an aquifer material. An aquifer material has a cation exchange capacity of 20 meq/100 g. All the exchange sites are initially occupied by Na. If 10 g of soil is placed in a 1 L solution that contains 20 mg/L Na+ and 40 mg/L Cs+, and ion exchange can be described by the equation: What will be the equilibrium concentrations of Na+ and Cs+ on the exchange sites and in the water?