alleryThe unusual stability of EDTA-metal complexes is mainly due to the:
AChelate effect (multi-ring formation)
BSingle coordinate bond's high enthalpy
CHigh oxidation state of bound metals
DHigh water solubility of EDTA salts
Answer & Solution
Correct answer: A. Chelate effect (multi-ring formation)
EDTA is HEXADENTATE (6 donor atoms).
Forming 5 chelate rings around a metal gives extraordinary stability (chelate effect).
Used in water hardness titration, soap manufacturing, food preservation.
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