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JEE Advanced 2018 Paper 1
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© examsnet.com
Question : 26
Total: 54
The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by
N
i
C
l
2
.6
H
2
O
to form a stable coordination compound. Assume that both the reactions are 100% complete. If
1584
g of ammonium sulphate and
952
g
of
N
i
C
l
2
.6
H
2
O
are used in the preparation, the combined weight (in grams) of gypsum and the nickel ammonia coordination compound thus produced is ________ .
(Atomic weights in
g
m
o
l
−
1
:
H
=
1
,
N
=
14
,
O
=
16
,
S
=
32
,
C
l
=
35.5
,
C
a
=
40
,
N
i
=
59
)
Your Answer:
Validate
Solution:
(
N
H
4
)
2
S
O
4
+
C
a
(
O
H
)
2
→
C
a
S
O
4
.2
H
2
O
+
2
N
H
3
1584
g gypsum(M=172) 24 mole
=
12
mol 12mol
N
i
C
l
2
.6
H
2
O
+
6
N
H
3
→
[
N
i
(
N
H
3
)
6
]
C
l
2
+
6
H
2
O
952
g
=
4
mol 24mol
(
M
=
232
)
4
m
o
l
Total mass
=
12
×
172
+
4
×
232
=
2992
g
© examsnet.com
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