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Chemistry
Chemistry
Problem
In which of the following reactions does sulfur have the biggest change in oxidation number? a.
3
H
2
SO
4
+
2
NaBr
→
2
NaHSO
4
+
Br
2
+
SO
2
+
2
H
2
O
3\text{H}_2\text{SO}_4 + 2\text{NaBr} \rightarrow 2\text{NaHSO}_4 + \text{Br}_2 + \text{SO}_2 + 2\text{H}_2\text{O}
3
H
2
SO
4
+
2
NaBr
→
2
NaHSO
4
+
Br
2
+
SO
2
+
2
H
2
O
b.
9
H
2
SO
4
+
8
NaI
→
8
NaHSO
4
+
4
I
2
+
4
H
2
O
+
H
2
S
9\text{H}_2\text{SO}_4 + 8\text{NaI} \rightarrow 8\text{NaHSO}_4 + 4\text{I}_2 + 4\text{H}_2\text{O} + \text{H}_2\text{S}
9
H
2
SO
4
+
8
NaI
→
8
NaHSO
4
+
4
I
2
+
4
H
2
O
+
H
2
S
c.
H
2
SO
4
+
2
KMnO
4
→
K
2
SO
4
+
Mn
2
O
7
+
H
2
O
\text{H}_2\text{SO}_4 + 2\text{KMnO}_4 \rightarrow \text{K}_2\text{SO}_4 + \text{Mn}_2\text{O}_7 + \text{H}_2\text{O}
H
2
SO
4
+
2
KMnO
4
→
K
2
SO
4
+
Mn
2
O
7
+
H
2
O
d.
H
2
SO
4
+
NaCl
→
NaHSO
4
+
HCl
\text{H}_2\text{SO}_4 + \text{NaCl} \rightarrow \text{NaHSO}_4 + \text{HCl}
H
2
SO
4
+
NaCl
→
NaHSO
4
+
HCl
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