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NEETChemistryCoordination Compounds

How are Ca2+ and Mg2+ ions selectively estimated in water hardness estimation?

Options

  1. AThey form stable complexes with DMG.
  2. BThey form stable complexes with a–nitroso–b–naphthol.
  3. CThey form stable complexes with cupron.
  4. DThey form stable complexes with EDTA due to differences in stability constants.

Correct answer

D. They form stable complexes with EDTA due to differences in stability constants.

Step-by-step solution

Ca2+ and Mg2+ ions are selectively estimated in water hardness estimation due to differences in the stability constants of their complexes with EDTA.

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