Multiple Choice
The "hardness ions", Ca2+, Mg2+, Fe2+/Fe3+, which are present in all ground water, can be removed by pretreating the water with
A) CaCl2.
B) KNO3.
C) Na2CO3.10H2O.
D) PbSO4.
E) 0.0100 M HCl.
Correct Answer:
Verified
Correct Answer:
Verified
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