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Tardigrade
Question
Chemistry
1 M and 2.5 L NaOH solution mixed with another 0.5 M and 3 L NaOH solution. Then find out molarity of resultant solution
Q.
1
M
and
2.5
L
N
a
O
H
solution mixed with another
0.5
M
and
3
L
N
a
O
H
solution. Then find out molarity of resultant solution
1553
218
Punjab PMET
Punjab PMET 2007
Solutions
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A
0.80 M
10%
B
1.0 M
23%
C
0.73 M
57%
D
0.50 M
11%
Solution:
Moles of
2.5
L
of
1
M
N
a
O
H
=
2.5
×
1
=
2.5
Moles of
3.0
L
of
0.5
M
N
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
M
≈
0.73
M