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Problem
Problem
Consider the following process:
3
I
−
(
aq
)
+
H
2
O
2
(
aq
)
+
2
H
+
(
aq
)
→
I
3
−
(
aq
)
+
2
H
2
O
(
l
)
3\text{I}^-(\text{aq}) + \text{H}_2\text{O}_2(\text{aq}) + 2\text{H}^+(\text{aq}) \rightarrow \text{I}_3^-(\text{aq}) + 2\text{H}_2\text{O}(\text{l})
3
I
−
(
aq
)
+
H
2
O
2
(
aq
)
+
2
H
+
(
aq
)
→
I
3
−
(
aq
)
+
2
H
2
O
(
l
)
Over a period of 2.0 min, the concentration of iodide ions in the solution decreased from
0.050
to
0.020
mol dm
−
3
0.050 \text{ to } 0.020 \text{ mol dm}^{-3}
0.050
to
0.020
mol dm
−
3
.
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