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Byju's Answer
Standard XII
Chemistry
Hydrogen Peroxide
Calculate the...
Question
Calculate the weight of
N
a
O
H
present in
500
m
l
of
0.2
M
N
a
O
H
solution.
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Solution
given : molarity of the solution =
0.2
M
i.e,
0.2
moles of
N
a
O
H
are present per litre of the solution.
so no. of moles of
N
a
O
H
in
500
m
l
of the solution is :
0.2
×
500
m
L
1
L
=
0.2
×
1
2
=
0.1
moles
molar mass of
N
a
O
H
= molar mass of
(
N
a
+
O
+
H
)
=
23
+
16
+
1
=
40
g
so mass of
0.1
mole
N
a
O
H
=
40
×
0.1
=
4
g
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Similar questions
Q.
The amount of
N
a
O
H
in
750
m
l
of
0.2
M
solution (Molecular weight
=
40
) is:
Q.
Calculate the number of moles of
N
a
O
H
present in 750ml. of 0.4M solution (Molecular weight of
N
a
O
H
=
40
)
Q.
Define Molarity. Calculate the molarity of a solution containing
5
g
of
N
a
O
H
in
500
m
l
of solution.
Q.
500
m
L
of
0.2
M
aqueous solution of acetic acid is mixed with
500
m
L
of
0.2
M
H
C
l
at
25
o
C
(a) Calculate the degree of dissociation of acetic acid in the resulting solution and pH of the solution.
(b) If
6
g
of
N
a
O
H
is added to the above solution, determine final pH. Assume there is no change in volume on mixing.
K
a
for acetic acid is
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×
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−
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L
−
1
.
Q.
A solution is prepared by dissolving
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