First slide

Hardness of water

Question

The common name of sodium hexa meta phosphate (Na₆P₆O₁₈) is

Easy

A

Calgon
B

Zeolit
C

Resin
D

Permutit

Solution

CALGON [Calcium gone] is the common name for Sodium hexa meta phosphate
$\large [NaPO_3]_6 \approx Na_6P_6O_{18}$
Hexamer of sodium meta phosphate
Sodium hexa meta Phosphate(or) Calgon(or) Graham's salt

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