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Question
Chemistry
For the reaction CaCO 3(s) leftharpoons CaO ( s )+ CO 2( g ) K p = 1.16 atm at 800° C. If 20 g of CaCO 3 were kept in a 10 litre container heated upto 800° C, what % age by weight of CaCO 3 would remain unreacted at equilibrium-
Q. For the reaction
C
a
C
O
3
(
s
)
⇌
C
a
O
(
s
)
+
C
O
2
(
g
)
K
p
=
1.16 atm at
80
0
∘
C
. If
20
g
of
C
a
C
O
3
were kept in a 10 litre container & heated upto
80
0
∘
C
, what
%
age by weight of
C
a
C
O
3
would remain unreacted at equilibrium-
2062
184
Equilibrium
Report Error
A
35%
B
6.8%
C
10.2%
D
None of those
Solution:
(
s
)
C
a
C
O
3
⇌
(
s
)
C
a
O
+
C
O
2
K
p
=
p
c
o
2
=
1.16
a
t
m
Apply,
P
V
=
n
RT
0.0821
×
1073
1.16
×
10
=
0.132
moles
Initial moles of
C
a
C
O
3
=
100
20
=
0.2
Mole of
C
a
C
O
3
reacted
=
0.132
Mole of
C
a
CO
unreacted
=
0.2
−
0.132
=
0.068
So, weight of
C
a
C
O
3
unreacted
=
0.068
×
100
=
6.8
%
age of
C
a
C
O
3
unreacted by weight
=
20
6.8
×
100
=
35%