a)

$CuS{O}_4\stackrel{H_{2}O}{\to }C{u}^{2+}+S{O}_4^{2-}$  

$C{u}^{2+}+2H_{2}O\to Cu{\left(OH\right)}_2+2H^{+}$  - odczyn kwasowy  

b)

$N{H}_{4}N{O}_3\stackrel{H_{2}O}{\to }N{H}_4^{+}+N{O}_3^{-}$  

$N{H}_4^{+}+H_{2}O\to N{H}_3\cdot H_{2}O+H^{+}$  - odczyn kwasowy  

c)

$FeC{l}_3\stackrel{H_{2}O}{\to }F{e}^{3+}+3C{l}^{-}$  

$F{e}^{3+}+3H_{2}O\to Fe{\left(OH\right)}_3+3H^{+}$  - odczyn kwasowy  

d)

$CaS\stackrel{H_{2}O}{\to }C{a}^{2+}+S^{2-}$  

$S^{2-}+2H_{2}O\to H_{2}S+2O{H}^{-}$  - odczyn zasadowy

e)

$K_{2}C{O}_3\stackrel{H_{2}O}{\to }2K^{+}+C{O}_3^{2-}$  

$C{O}_3^{2-}+2H_{2}O\to H_{2}C{O}_3+2O{H}^{-}$  - odczyn zasadowy

f)

$N{a}_{3}P{O}_4\stackrel{H_{2}O}{\to }3N{a}^{+}+P{O}_4^{3-}$  

$P{O}_4^{3-}+3H_{2}O\to H_{3}P{O}_4+3O{H}^{-}$  - odczyn zasadowy