Question

How many ions would be furnished by the complex CoCl₃.6NH₃ in aqueous solution?

Answer 1

The formula CoCl₃.6NH₃ corresponds to the complex:

[Co(NH₃)₆]Cl₃

In aqueous solution, [Co(NH₃)₆]Cl₃ ionises as:

\[\ce{[Co(NH3)6]Cl3 → [Co(NH3)6]^3+ + 3Cl^-}\]

In aqueous solution, CoCl₃·6NH₃ furnishes 4 ions in total:

1 [Co(NH₃)₆]³⁺ ion and 3 Cl⁻ ions.