Choose the correct statement:The reason for use of polyphosphates as water softening agents is, that

A
they form soluble complexes with anionic species
B
they precipitate out cationic species
C
they precipitate out anionic species
D
they form soluble complexes with cationic species

Solution:

Polyphosphates (e.g., sodium hexa metaphosphate) form soluble complexes with cations such as ${Ca}^{2 +}$ ${Mg}^{2 +}$ and so they are used as water softening agents.

Choose the correct statement:
The reason for use of polyphosphates as water softening agents is, that

Solution:

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