Hydrogen And Its Compounds Question 221
Question: Polyphosphates are used as water softening agents because
Options:
A) form soluble complexes anionic species
B) precipitate anionic species
C) from soluble complexes with cationic species
D) precipitate cationic species
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Polyphosphates are used as water softening agent because they form soluble complexes with cationic species. $ 2MCl_2+Na_2[Na_4{{(PO_3)}_6}]\to Na_2[M_2{{(PO_3)}_6}]+4NaCl $ $ (M=CaorMg) $
$ (M=CaorMg) $ From hard water Complex salt soluble
BETA
