Question

The correct order of the stoichiometries of AgCl formed when AgNO₃ in excess is treated with the complexes:

CoCl₃·6NH₃, CoCl₃·5NH₃, CoCl₃·4NH₃ respectively is:

विकल्प

• 1 AgCl, 3AgCl, 2AgCl

• 3 AgCl, 1 AgCl, 2 AgCl

• 3 AgCl, 2 AgCl, 1 AgCl

• 2 AgCl, 3 AgCl, 1 AgCl

Answer 1

3 AgCl, 2 AgCl, 1 AgCl

Explanation:

The number of AgCl precipitates depends on the number of free Cl⁻ ions (outside the coordination sphere):

• CoCl₃·6NH₃ → [Co(NH₃)₆]Cl₃ → 3 free Cl⁻ → 3 AgCl
• CoCl₃·5NH₃ → [Co(NH₃)₅Cl]Cl₂ → 2 free Cl⁻ → 2 AgCl
• CoCl₃·4NH₃ → [Co(NH₃)₄Cl₂]Cl → 1 free Cl⁻ → 1 AgCl

The correct order is: 3 AgCl, 2 AgCl, 1 AgCl