Permute is a sodium aluminium silicate which is used to remove the hardness of water and the chemical formula of permute is 2 2 2 8 2 . Na Al Si O xH O . These complex salts are also known as zeolites. 2 2 2 2 8 2 Na Al Si O .xH O Ca -> 2 2 8 2 CaAl Si O .xH O HYDROGEN 13 100. Polyphosphates like sodium hexametaphosphate (calgon) are used as water softening agents because they (a) forms soluble complexes with anionic species (b) precipitate anionic species (c) form soluble complexes with cationic species (d) precipitate cationic species. form soluble complexes with cationic species 101. In
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