g,
+ $FeS+H_2SO_4\to FeSO_4+H_2S$
+ $FeS+2H^++SO_4^{2-}\to Fe^{2+}+SO_4^{2-}+H_2S$
+ $FeS+2H^+\to Fe^{2+}+H_2S$
h,
+ $CH_3COONa+HCl\to CH_3COOH+NaCl$
+ $CH_3COO^-+Na^++H^+Cl^-\to CH_3COOH+Na^++Cl^-$
+ $CH_3COO^-+H^+\to CH_3COOH$
i,
+ $Ca(HCO_3)_2+NaOH\to CaCO_3+NaHCO_3+H_2O$
+ $Ca^{2+}+2HCO_3^-+Na^++OH^-\to CaCO_3+Na^++HCO_3^-+H_2O$
+ $Ca^{2+}+HCO_3^-+OH^-\to CaCO_3+H_2O$
j,
+ $Ba(HCO_3)_2+2HCl\to BaCl_2+2CO_2+2H_2O$
+ $Ba^{2+}+2HCO_3^-+2H^++2Cl^-\to Ba^{2+}+2Cl^-+2CO_2+2H_2O$
+ $HCO_3^-+H^+\to CO_2+H_2O$
