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Reaction of calgon with hard water conta...

Reaction of calgon with hard water containing `Ca^2+` ions produce

A

`[Na_2CaP_6O_18]^-2`

B

`Ca_2(PO_4)_3`

C

`CaCO_3`

D

`CaSO_4`

Text Solution

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The correct Answer is:
A
Answer(1) Calgon reacts with hard water containing `Ca^2+` ions and produce `[Na_2CaP_6O_18]^-2`
`Na_2 [Na_4P_6O_18]^-2 + Ca^2+ rightarrow [Na_2CaP_6O_18]^2- + 4Na^+`
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