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Standard XII
Chemistry
Acyl Substitution Revisited
1g mixture of...
Question
1g mixture of CaCO_{3_{}} and NaCl react completely with 100 ml of N/10 HCl. The % of CaCO_{3_{}} in the mixture is
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Q.
500
m
L
of a solution of
C
a
C
O
3
and
N
a
O
H
was first titrated with
N
10
H
C
l
using phenolphthalein indicator.
18.5
m
L
of
H
C
l
was required for the end point. After that methyl orange indicator was used and
2.5
m
L
of same
H
C
l
was required for the next end point. Find out the mass of
C
a
C
O
3
in the mixture.
Q.
A mixture contains
2.5
g
C
a
C
O
3
and
3.0
g
N
a
C
l
. What is the percent by mass of
C
a
C
O
3
?
Q.
According to the
C
a
C
O
3
+
H
C
l
→
C
a
C
l
2
+
C
O
2
+
H
2
O
. What mass of
C
a
C
O
3
is required to react completely with
25
ml. of
0.75
M
H
C
l
?
Q.
Calcium carbonate reacts with aqueous
H
C
l
according to the reaction:
C
a
C
O
3
(
s
)
+
2
H
C
l
(
a
q
)
→
C
a
C
l
2
(
a
q
)
+
C
O
2
(
g
)
+
H
2
O
(
l
)
What mass of
C
a
C
O
3
is required to react completely with
25
ml of
0.75
M
H
C
l
?
Q.
What is the volume of
0.1
M
H
C
l
required to react completely with
1
g
mixture of equimolar amount of
N
a
2
C
O
3
and
N
a
H
C
O
3
?
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Standard XII Chemistry
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