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Question
Chemistry
20 ml of 0.02 M KMnO4 was required to completely oxidise 10 ml of oxalic acid solution. What is the molarity of the oxalic acid solution?
Q. 20 ml of
0.02
M
K
M
n
O
4
was required to completely oxidise 10 ml of oxalic acid solution. What is the molarity of the oxalic acid solution?
1398
215
Solutions
Report Error
A
0.1
M
68%
B
0.4
M
22%
C
1.0
M
5%
D
4.0
M
5%
Solution:
The concerned reaction is
2
K
M
n
O
4
+
3
H
2
S
O
4
+
5
(
COO
H
)
2
→
K
2
S
O
4
+
2
M
n
S
O
4
+
10
C
O
2
+
8
H
2
O
[
For
K
M
n
O
4
]
V
1
=
20
m
l
M
1
=
0.02
M
[
For oxalic acid
]
V
2
=
10
m
l
M
2
=
?
n
1
=
2
,
n
2
=
5
n
1
M
1
V
1
=
n
2
M
2
V
2
2
0.02
×
20
=
5
M
2
×
10
M
2
=
10
×
2
0.02
×
20
×
5
=
0.1
M