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2
H
_{2}
S
^{II}
+
3
O
_{2}
^{0}
→
2
S
^{IV}
O
_{2}
^{II}
+
2
H
_{2}
O
S
^{II}

6
e
^{}
→
S
^{IV}
O
^{0}
+
2
e
^{}
→
O
^{II}
Change the oxidation states
Search by reactants (
H
_{2}
S
,
O
_{2}
)
1.
H
_{2}
S
+
O
_{2}
→ SO
_{2}
+ H
_{2}
O
2.
H
_{2}
S
+ Ag +
O
_{2}
→ Ag
_{2}
S + H
_{2}
O
3.
H
_{2}
S
+
O
_{2}
→ S + H
_{2}
O
Search by products (
S
O
_{2}
,
H
_{2}
O
)
1
2
3
4
5
6
1.
H
_{2}
SO
_{4}
+ Cu → CuSO
_{4}
+
SO
_{2}
+
H
_{2}
O
2.
Ag + H
_{2}
SO
_{4}
→ Ag
_{2}
SO
_{4}
+
H
_{2}
O
+
SO
_{2}
3.
H
_{2}
S + O
_{2}
→
SO
_{2}
+
H
_{2}
O
4.
Na
_{2}
S
_{2}
O
_{3}
+ H
_{2}
SO
_{4}
→ Na
_{2}
SO
_{4}
+ S +
SO
_{2}
+
H
_{2}
O
5.
Hg + H
_{2}
SO
_{4}
→ HgSO
_{4}
+
H
_{2}
O
+
SO
_{2}
6.
Sn + H
_{2}
SO
_{4}
→ Sn(SO
_{4}
)
_{2}
+
SO
_{2}
+
H
_{2}
O
7.
C + H
_{2}
SO
_{4}
→
SO
_{2}
+ CO
_{2}
+
H
_{2}
O
8.
HBr + H
_{2}
SO
_{4}
→ Br
_{2}
+
SO
_{2}
+
H
_{2}
O
9.
Na
_{2}
SO
_{3}
+ H
_{2}
SO
_{4}
→
SO
_{2}
+ Na
_{2}
SO
_{4}
+
H
_{2}
O
10.
H
_{2}
SO
_{4}
+ P → H
_{3}
PO
_{4}
+
SO
_{2}
+
H
_{2}
O
1
2
3
4
5
6
Search by reactants (
H
_{2}
S
,
O
_{2}
) and by products (
S
O
_{2}
,
H
_{2}
O
)
1.
H
_{2}
S
+
O
_{2}
→
SO
_{2}
+
H
_{2}
O