Is the conversion of sodium perrhenate to the tetrabutylammonium salt a double replacement reaction?
Answers
Answer:
The general form for a metathesis reaction looks like this
AX
+
BY
→
AY
+
BX
, where
A
,
B
- cations;
X
,
Y
- anions.
In your case, the reaction between sodium perrhenate, or
N
a
R
e
O
4
, and tetrabutylammonium chloride, or
(
C
H
3
(
C
H
2
)
3
)
4
N
C
l
(you'll sometimes see this written as
N
(
C
4
H
9
)
4
C
l
), will produce sodium chloride, or
N
a
C
l
, and tetrabutylammonium perrhenate, or
N
(
C
4
H
9
)
4
R
e
O
4
.
N
a
R
e
O
4
+
N
(
C
4
H
9
)
4
C
l
→
N
a
C
l
+
N
(
C
4
H
9
)
4
R
e
O
4
The reaction takes place in aqueous solution (aq), and the tetrabutylammonium perrhenate salt will precipitate from solution.
The counterions that will exchange partners are
N
a
+
and
N
(
C
4
H
9
)
+
4
(cations), and
R
e
O
−
4
and
C
l
−
(anions).
Explanation: