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Question
Chemistry
1 M and 2.5 litre NaOH solution mixed with another 0.5 M and 3 litre NaOH solution. Then find out molarity of resultant solution: -
Q. 1 M and 2.5 litre NaOH solution mixed with another 0.5 M and 3 litre NaOH solution. Then find out molarity of resultant solution : -
8219
193
AIPMT
AIPMT 1980
Solutions
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A
0.80 M
14%
B
1.0 M
14%
C
0.73 M
68%
D
0.50 M
4%
Solution:
Mole of
2.5
L
of
1
MN
a
O
H
=
2.5
×
1
=
2.5
Mole of
3.0
L
of
0.5
MN
a
O
H
=
3.0
×
0.5
=
1.5
Total moles of
N
a
O
H
in solution
=
2.5
+
1.5
=
4.0
(Total volume of solution
=
2.5
+
3.0
=
5.5
L
)
Thus,
M
1
×
V
1
=
M
2
×
V
2
4.0
=
M
2
×
5.5
Molarity of resultant solution
=
M
2
=
5.5
4.0
=
0.73
M