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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:

1. 3 AgCl, 1 AgCl, 2 AgCl
2. 3 AgCl, 2 AgCl, 1 AgCl
3. 2 AgCl, 3 AgCl, 1 AgCl
4. 1 AgCl, 3 AgCl, 2 AgCl

Correct answer: 3 AgCl, 2 AgCl, 1 AgCl

Solution

The number of AgCl precipitates corresponds to the number of free Cl- ions in each complex, which depends on the coordination structure.

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