describe the electrolysis of concentrated aqueous potassium bromide
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Answer:
Explanation:
It means the charge is taken away from the potassium and chloride ions at the electrodes.
Explanation:
The solution may be represented by
K
+
(
a
q
)
and
C
l
−
(
a
q
)
At the positive electrode (anode) the following happens:
C
l
−
→
C
l
+
e
−
2
C
l
→
C
l
2
(
g
)
At the other side (cathode):
K
+
+
e
−
→
K
K
+
H
2
O
→
K
+
+
O
H
−
+
H
2
H
→
H
2
(
g
)
So the net result is that at the anode chlorine gas is released, at the cathode hydrogen gas is released, and a strong solution of potassium hydroxide is left in the container:
2
K
C
l
(
a
q
)
+
2
H
2
O
→
2
K
O
H
(
a
q
)
+
H
2
(
g
)
+
C
l
2
(
g
)
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