How can I balance this chemical equations? Aluminum and hydrochloric acid react to form aluminum chloride and hydrogen gas.
Answers
Answered by
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Answer:2
Al
(
s
)
+
6
HCl
(
a
q
)
→
3
H
2
(
g
)
+
2
AlCl
3
(
a
q
)
Explanation:
This reaction is between a metal and an acid which typically results in a salt and the release of hydrogen gas. The unbalanced reaction is
A
l
+
H
C
l
→
H
2
+
A
l
C
l
3
.
This is a redox reaction, whose half-reactions are and become:
2
(
Al
(
s
)
→
Al
3
+
(
a
q
)
+
3
e
−
)
3
(
2
H
+
(
a
q
)
+
2
e
−
→
H
2
(
g
)
)
-----------------------------------------------
2
Al
(
s
)
+
6
H
+
(
a
q
)
→
3
H
2
(
g
)
+
2
Al
3
+
(
a
q
)
Aluminum oxidizes as
Al
→
Al
3
+
, while hydrogen reduces as
2
H
+
→
H
0
2
.
If we add back the spectator
Cl
−
, we get:
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