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  • Calgon is used for water treatment. WHich of the following statement is NOT true about calgon? Option: 1 It does not remove &nb

Calgon is used for water treatment. WHich of the following statement is NOT true about calgon?
Option: 1 It does not remove Ca^{2+} ion by precipitation
Option: 2 Calgon contains the 2nd most abundunt elementby weight in the earth's crust.
Option: 3 It also known as Graham;s salt.
Option: 4 It is polymeric compound and is water soluble.

Answers (1)

best_answer

Order of abundance of element in earth crust is

O > Si > Al > Fe > Ca > Na > Mg > K

2nd most abundant element is "Si" and it is not present in Calgon.

Na6P6O18 = Calgon (Graham's salt) (Sodium hexametaphosphate)

It exists in a polymeric form as (NaPO3 )6 and water-soluble compound.

It removes Ca2+ insoluble ion but not by precipitation

 

Posted by

sudhir.kumar

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