Em tham khảo nha :
\(\begin{array}{l}
a)\\
{H_2}S:{S^{ - 2}}\\
S:{S^0}\\
{H_2}S{O_3}:{S^{ + 4}}\\
S{O_3}:{S^{ + 6}}\\
{H_2}S{O_4}:{S^{ + 6}}\\
A{l_2}{(S{O_4})_3}:{S^{ + 6}}\\
S{O_4}^{2 - }:{S^{ + 6}}\\
HS{O_4}^ - :{S^{ + 6}}\\
b)\\
HCl:C{l^ - }\\
HClO:C{l^ + }\\
NaCl{O_2}:C{l^{ + 3}}\\
KCl{O_3}:C{l^{ + 5}}\\
C{l_2}{O_7}:C{l^{ + 7}}\\
Cl{O_4}^ - :C{l^{ + 7}}\\
C{l_2}:C{l^0}\\
c)\\
Mn:M{n^0}\\
MnC{l_2}:M{n^{ + 2}}\\
Mn{O_2}:M{n^{ + 4}}\\
KMn{O_4}:M{n^{ + 7}}\\
{H_2}Mn{O_2}:M{n^{ + 2}}\\
MnS{O_4}:M{n^{ + 2}}\\
M{n_2}O:M{n^{ + 1}}\\
Mn{O_4}^ - :M{n^{ + 7}}
\end{array}\)
