Figure 20.

Graphical illustration of the dependence ${\zeta }_1^r=f(\Delta C_1, \Delta C_2$ = constant) (r = A, B) for HCl solutions in NH₄OH aqueous solution and concentration polarization conditions. Graphs 2A and 2B—for ΔC₂ = 250 mol m⁻³ and graphs 3A and 3B—for ΔC₂ = 500 mol m⁻³.