The chemicals used to soften hard water involves the addition of
A.
insoluble sodium compounds which from soluble solutions of calcium and magesium
B.
solube soudium compounds which from soluble solutions of calcium and magnesium ions
C.
solube sodium compounds which from insoluble precipitates of calcium and magnesium ions
D.
insoluble precipitates of calcium and magnesium ions
Correct Answer: Option C
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