Em tham khảo nha:
\(\begin{array}{l}
1)\\
F{e_2}{(S{O_4})_3} \to 2F{e^{3 + }} + 3S{O_4}^{2 - }\\
2)\\
CaC{l_2} \to C{a^{2 + }} + 2C{l^ - }\\
3)\\
Al{(N{O_3})_3} \to A{l^{3 + }} + 3N{O_3}^ - \\
4)\\
{K_3}P{O_4} \to 3{K^ + } + P{O_4}^{3 - }
\end{array}\)