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Byju's Answer
Standard XII
Chemistry
First Order Reaction
CH3COOC2H5+Na...
Question
C
H
3
C
O
O
C
2
H
5
+
N
a
O
H
→
C
H
3
C
O
O
N
a
+
C
2
H
5
O
H
Rate
=
K
[
C
H
3
C
O
O
C
2
H
5
]
[
N
a
O
H
]
If three times water is added to the reaction mixture, the rate of the reaction compared to the original rate will be:
A
1
3
r
d
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B
1
9
t
h
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C
1
16
t
h
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D
16
t
i
m
e
s
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Solution
The correct option is
C
1
16
t
h
The rate law expression is
r
=
K
[
C
H
3
C
O
O
C
2
H
5
]
[
N
a
O
H
]
When three times water is added, the volume becomes four times the original volume.
Hence, the concentration of each reactant becomes one fourth.
The rate law expression becomes
r
′
=
K
.
[
C
H
3
C
O
O
C
2
H
5
]
4
[
N
a
O
H
]
4
=
r
16
.
Hence, option C is correct.
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0
Similar questions
Q.
The rate of the reaction
C
H
3
C
O
O
C
2
H
5
+
N
a
O
H
→
C
H
3
C
O
O
N
a
+
C
2
H
5
O
H
is given as rate=
K
[
C
H
3
C
O
O
C
2
H
5
]
[
N
a
O
H
]
+
.If three times water is added to the reaction mixture,what will be the rate of the reaction compared to the original rate?
Q.
The rate of the reaction:
C
H
3
C
O
O
C
2
H
5
+
N
a
O
H
→
C
H
3
C
O
O
N
a
+
C
2
H
5
O
H
is given by the equation,
r
a
t
e
=
k
[
C
H
3
C
O
O
C
2
H
5
]
[
N
a
O
H
]
If concentration is expressed in
m
o
l
/
L
, the units of
k
are:
Q.
The reaction,
C
H
3
C
O
O
C
2
H
5
+
N
a
O
H
→
C
H
3
C
O
O
N
a
+
C
2
H
5
O
H
is:
Q.
The reaction
C
H
3
C
O
O
C
2
H
5
+
N
a
O
H
→
C
H
3
C
O
O
N
a
+
C
2
H
5
O
H
is allowed to take place with initial concentrations of 0.2 mole/lit of each reactant. If the reaction mixture is diluted with water so that the initial concentration of each reactant becomes 0.1 mole/lit, the rate of the reaction will be:
Q.
Question 28
Which of the following represents saponification reaction?
(a)
C
H
3
C
O
O
N
a
+
N
a
O
H
C
a
O
−
−
→
C
H
4
+
N
a
2
C
O
3
(b)
C
H
3
C
O
O
H
+
C
2
H
5
O
H
H
2
S
O
4
−
−−−
→
C
H
3
C
O
O
C
2
H
5
+
H
2
O
(c)
2
C
H
3
C
O
O
H
+
2
N
a
→
2
C
H
3
C
O
O
N
a
+
H
2
(d)
C
H
3
C
O
O
C
2
H
5
+
N
a
O
H
→
C
H
3
C
O
O
N
a
+
C
2
H
5
O
H
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