A) distillation method
B) EDTA method
C) conductivity method
D) trimetric method
Correct Answer: B
Solution :
The hardness of water is due to the presence of\[C{{a}^{2+}}\]and\[M{{g}^{2+}}\]ions. These ions forms complexes with EDTA. Therefore, EDTA is used for the estimation of hardness of water.
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