Реши задание на изображении

а)
\(\mathrm{H_3PO_4 \rightleftharpoons H^+ + H_2PO_4^-}\)
\(\mathrm{H_2PO_4^- \rightleftharpoons H^+ + HPO_4^{2-}}\)
\(\mathrm{HPO_4^{2-} \rightleftharpoons H^+ + PO_4^{3-}}\)

б)
\(\mathrm{MgOHCl \to MgOH^+ + Cl^-}\)
\(\mathrm{MgOH^+ \rightleftharpoons Mg^{2+} + OH^-}\)

в)
\(\mathrm{Ca(OH)_2 \to CaOH^+ + OH^-}\)
\(\mathrm{CaOH^+ \rightleftharpoons Ca^{2+} + OH^-}\)

г)
\(\mathrm{NaHCO_3 \to Na^+ + HCO_3^-}\)
\(\mathrm{HCO_3^- \rightleftharpoons H^+ + CO_3^{2-}}\)