3. Solving a chemistry problem

6. Plot a graphical dependence of the zeta potential at the interface of the glass-water solution of electrolytes Ca(NO3)2, Al(NO3)2, Th(NO3)3 on their concentrations:
Sal, mol/l, zeta potential, mV 3*10-7 3*10-6 1*10-4 1*10-2
Ca(NO3)2 -145 -120 -80 -33
Al(NO3)3 -115 -15 55 30
Th(NO3)3 -90 45 140 83
Explain the effect of the charge of cations on the change in the zeta potential.