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What is the coordination number of the complex [Co(NH3)6]Cl3?

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Question: What is the coordination number of the complex [Co(NH3)6]Cl3?

Options:

  1. 4
  2. 6
  3. 2
  4. 8

Correct Answer: 6

Solution: 

The coordination number is determined by the number of ligand donor atoms bonded to the central metal ion. In [Co(NH3)6]Cl3, there are six ammonia ligands, giving a coordination number of 6.

What is the coordination number of the complex [Co(NH3)6]Cl3?

Practice Questions

Q1
What is the coordination number of the complex [Co(NH3)6]Cl3?
  1. 4
  2. 6
  3. 2
  4. 8

Questions & Step-by-Step Solutions

What is the coordination number of the complex [Co(NH3)6]Cl3?
  • Step 1: Identify the central metal ion in the complex. In this case, it is Co (Cobalt).
  • Step 2: Identify the ligands attached to the central metal ion. Here, the ligand is NH3 (ammonia).
  • Step 3: Count the number of ligand donor atoms. Each NH3 ligand has one donor atom (the nitrogen atom).
  • Step 4: Count how many NH3 ligands are present. There are 6 NH3 ligands in [Co(NH3)6].
  • Step 5: Calculate the coordination number by adding the number of donor atoms from all ligands. Since there are 6 NH3 ligands, the coordination number is 6.
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