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Most Important Selected Qs for JEE AdvancedChemistryCoordination Compounds

Paragraph: EDTA is used as a complexing agent in chemical analysis. Solution of EDTA usually containing the disodium salt Na ₂ H ₂ EDTA are also used to treat heavy metal poisoning. EDTA is a hexadentate ligand having the following structure. Question: A solution having equal moles of both reactant show the following equilibrium ( Keq =10⁻³ ) Pb ²⁺( aq )+ H ₂ EDTA ²⁻( aq ) PbEDTA ²⁻( aq )+2 H ⁺( aq ) If concentration

Options

  1. AHigh negative charge density
  2. BChelation
  3. CLow negative charge density
  4. DBecause it is very weak field ligand

Correct answer

B. Chelation

Step-by-step solution

Let conc. of both reactants at equilibrium is M aligned & Keq = [ PbEDTA ²⁻ ] [ H ⁺ ]^2 x ^2 & x =10⁻³ aligned

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