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Byju's Answer
Standard XII
Chemistry
Classification of Hydrocarbons
Equivalent ma...
Question
Equivalent mass of Na2CO3 when titrated with HCl using phenolphthalein indicator will be
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Solution
Na2CO3 + HCl ---------------------> NaHCO3 + NaCl
this will be the reaction
so equivalent mass will be same as 106
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Similar questions
Q.
Calculate the equivalent mass of
N
a
2
C
O
3
when it is titrated against
H
C
l
in presence of phenolphthalein.
Q.
25
m
L
of a mixture of
N
a
O
H
and
N
a
2
C
O
3
when titrated with
N
/
10
H
C
l
using phenolphthalein indicator required
25
m
L
H
C
l
. The same volume of mixture when titrated with
N
/
10
H
C
l
using methyl orange indicator required
30
m
L
of
H
C
l
. Calculate the amount of
N
a
2
C
O
3
and
N
a
O
H
in one litre of this mixture.
Q.
Assertion :In the titration of
N
a
2
C
O
3
with
H
C
l
using methyl orange indicator, the volume required at the equivalence point is twice that of the acid required using phenolphthalein indicator. Reason: Two moles of
H
C
l
is required for the complete neutralization of
1
mole of
N
a
2
C
O
3
.
Q.
Assertion :In the titration of
N
a
2
C
O
3
with
H
C
l
using methyl orange indicator, the volume required at the equivalence point is twice that of the acid required using phenolphthalein indicator. Reason:
2
mol of
H
C
l
am required for complete neutralization of one mol of
N
a
2
C
O
3
.
Q.
When
10
g
mixture of
N
a
2
C
O
3
and
N
a
O
H
was titrated against
H
C
l
by using phenolphthalein followed by adding methyl orange after first equivalence point,
7.7818
g
of
H
C
l
was consumed in total. Find the mass of
N
a
2
C
O
3
in the mixture.
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