46. Solving a chemistry problem

325. For complete desalination by ion-exchange adsorption, Vm 3 of natural or diluted waste water is sequentially passed through columns containing m1 kg of cation exchanger in the H-form, DOEcat moleq / kg and m2 kg of anion exchanger in the OH-form, DOE anio mol-eq / kg ( table 3.2).
1) Write the equations of ion-exchange reactions occurring on the cation exchanger and anion exchanger with the participation of ions of each salt.
2) Determine in what sequence the ions will be adsorbed on the cation exchanger and anion exchanger, arranging them in a row according to the decrease in adsorbability.
3) Convert the concentration of salts in an aqueous solution, expressed in g / l, to the molar concentration of equivalents (mol equiv / l) and determine the total concentration of salts in (mol equiv / l).
4) Calculate the amount (m1 and m2, kg) of cation exchanger and anion exchanger sufficient to desalinate a given volume of water.
DOEcation exchanger, Mole equiv/kg 4.0
DOE of anion exchanger, Mole equiv/kg 4.2
V, m^3 120
Salt formula Pb(NO3)2 AgNO3 Hg(NO3)2 Al(NO3)3
concentr. Sal, g/l 0.01 0.04 0.021 0.012