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Question
Chemistry
The formula of Calgon, used for water softening is
Q. The formula of Calgon, used for water softening is
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220
CMC Medical
CMC Medical 2009
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A
N
a
2
[
N
a
4
(
P
O
3
)
6
]
B
N
a
4
[
N
a
2
(
P
O
3
)
6
]
C
N
a
2
[
N
a
4
(
P
O
4
)
5
]
D
N
a
4
[
N
a
4
(
P
O
4
)
6
]
Solution:
Calgon is used for water softening. Its formula is
N
a
2
[
N
a
4
(
P
O
3
)
6
]
.