MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryHydrogenPrevious Year Questions
The formula of Calgon, used for water softening is (EAMCET 2007)
A.Na2[Na4(PO3)6]✓ Correct
B.Na4[Na2(PO3)6]
C.Na2[Na4(PO4)5]
D.Na4[Na4(PO4)6]
Explanation
The chemical formula of Calgon is 2 4 3 6 Na Na PO and it is also known as sodium hexametaphosphate. It is used to remove the permanent hardness of water by softening the hard water with the anion of Calgon. 2 2 2 4 6 18 2 6 18 2 Ca Na P O Na CaP O Na ->
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