Question

How many ions will be generated from the solution of the complex \( [Co(NH_3)_6]Cl_2 \)?

• A. 6
• B. 4
• C. 3
• D. 2

Hint:

When a coordination compound dissociates in water, the number of ions formed is equal to the sum of the charge on the complex and the number of counter ions.

Answer 1

The Correct Option is B

The complex \( [Co(NH_3)_6]Cl_2 \) consists of a coordination sphere \( [Co(NH_3)_6]^{2+} \) and 2 chloride ions \( Cl^- \) outside the coordination sphere. When this complex dissolves in water, it dissociates as follows:
\[ [Co(NH_3)_6]Cl_2 \rightarrow [Co(NH_3)_6]^{2+} + 2Cl^- \] Thus, the total number of ions generated is: - 1 ion of \( [Co(NH_3)_6]^{2+} \),
- 2 ions of \( Cl^- \).
The total number of ions = 1 + 2 = 3 ions. Therefore, the correct answer is option (C) 3.