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Byju's Answer
Standard XII
Chemistry
Molarity
Define Molari...
Question
Define Molarity. Calculate the molarity of a solution containing
5
g
of
N
a
O
H
in
500
m
l
of solution.
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Solution
Molarity
→
Molarity is the concentration of a solution expressed as the number of moles of solute per litre of solution.
Molarity
=
No. of moles of solute
Volume of solution
(
in L
)
Now,
Molecular mass of
N
a
O
H
=
40
g
Given mass of
N
a
O
H
=
5
g
No. of moles
(
n
)
=
Given mass
Molecular mass
=
5
40
=
0.125
mol
Volume of solution
(
V
)
=
500
m
L
=
500
1000
=
0.5
L
Therefore,
Molarity
=
0.125
0.5
=
0.25
M
Hence the molarity of solution is
0.25
M
.
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