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Chemistry
Chemistry
Problem
Two consecutive reactions are carried out in aqueous solution: 1.
P
b
2
+
(
a
q
)
+
2
C
l
−
(
a
q
)
→
P
b
C
l
2
(
s
)
\mathrm{Pb^{2+}(aq) + 2\,Cl^{-}(aq) \rightarrow PbCl_2(s)}
P
b
2
+
(
aq
)
+
2
C
l
−
(
aq
)
→
PbC
l
2
(
s
)
2.
P
b
C
l
2
(
s
)
+
2
I
−
(
a
q
)
→
P
b
I
2
(
s
)
+
2
C
l
−
(
a
q
)
\mathrm{PbCl_2(s) + 2\,I^{-}(aq) \rightarrow PbI_2(s) + 2\,Cl^{-}(aq)}
PbC
l
2
(
s
)
+
2
I
−
(
aq
)
→
Pb
I
2
(
s
)
+
2
C
l
−
(
aq
)
In one concise sentence, explain why
C
l
−
\mathrm{Cl^{-}}
C
l
−
does not appear in the overall net ionic equation for the combined process.
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