Coordination CompoundHard
Question
The reagent commonly used to determine hardnwss of water is :
Options
A.oxalic acid
B.disodium salt of EDTA
C.sodium citrate
D.sodium thiosulphate
Solution
The reagent commonly used is EDTA (ethylene diamine tetraacetate)which acts as ligand for metal ions responsible for hardness of water. They form metal ligand complex which renders the metal ion inactive by making them non-ionisable.
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