${\text{Zn}}_{}^{2+}\underset{+2{\text{H}}_{}^{+}}{\overset{+2{\text{OH}}_{}^{-<!--\; -\; -->}}{\rightleftharpoons }}\underset{\text{amphoteres Hydroxid}}{\text{Zn}{(\text{OH})}_2^{}\downarrow <!--\; \downarrow \; -->}\underset{+2{\text{H}}_{}^{+}}{\overset{+2{\text{OH}}_{}^{-<!--\; -\; -->}}{\rightleftharpoons }}\underset{\text{Hydroxozikat}}{{[\text{Zn}{(\text{OH})}_4^{}]}_{}^{2-<!--\; -\; -->}}$