First slide

Werner's theory

Question

The correct order of the stoichiometries of AgCl formed when ${AgNO}_{3}$ in excess is treated with the complexes ${CoCl}_{3} . 6 {NH}_{3}, {CoCl}_{3} . 5 {NH}_{3}, {CoCl}_{3} . 4 {NH}_{3}$ respectively is

Moderate

Solution

$[Co {({NH}_{3})}_{6}] {Cl}_{3} + 3 {AgNO}_{3} ⟶ 3 AgCl ↓ + [Co {({NH}_{3})}_{6}] {({NO}_{3})}_{3} [Co {({NH}_{3})}_{5} Cl] {Cl}_{2} + 2 {AgNO}_{3} ⟶ 2 AgCl ↓ + [Co {({NH}_{3})}_{5} Cl] {({NO}_{3})}_{2} [Co {({NH}_{3})}_{4} {Cl}_{2}] Cl + {AgNO}_{3} ⟶ AgCl ↓ + [Co {({NH}_{3})}_{4} {Cl}_{2}] {NO}_{3}$

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