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One mole of complex compound Co(NH₃)₅ Cl₃ gives 3 mol of ions on dissolution in water. One mol of same complex reacts with two mol of AgNO₃ solution to form two mol of AgCl(s). The struture of complex is
  • a)
    [Co(NH₃)₅Cl]Cl₂
  • b)
    [Co(NH₃)₃cl₃].2NH₃
  • c)
    [Co(NH₃)₄Cl₂]Cl.2NH₃
  • d)
    [Co(NH₃)₄Cl]Cl₂.NH₃
Correct answer is option 'A'. Can you explain this answer?
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One mole of complex compound Co(NH) Cl gives 3 mol of ions on dissolut...
Structure Determination of Complex Compound Co(NH)Cl

Given Information:
- One mole of Co(NH)Cl gives 3 mol of ions on dissolution in water.
- One mol of the same complex reacts with two mol of AgNO solution to form two mol of AgCl(s).

Step 1: Determine the Coordination Number of Cobalt
- Since one mole of Co(NH)Cl gives 3 mol of ions, the complex must be a cation with a charge of +3.
- The only way for cobalt to have a +3 charge is if it has lost three electrons, making it a d6 ion.
- The most common coordination numbers for d6 ions are 4 and 6.
- However, since the complex only gives 2 mol of AgCl(s) when two mol of AgNO are added, the coordination number must be 4 since only four chloride ions are required to form 2 mol of AgCl(s).

Step 2: Determine the Geometry of the Complex
- A coordination number of 4 can result in either a tetrahedral or a square planar geometry.
- To determine the geometry, we need to know the number of ligands and whether they are strong-field or weak-field ligands.
- The chloride ligand is a weak-field ligand, which means it does not create a large splitting of the d-orbitals.
- Ammonia is a strong-field ligand, which means it creates a large splitting of the d-orbitals.
- A tetrahedral geometry would require all four ligands to be the same, which is not the case here.
- Therefore, the complex has a square planar geometry.

Step 3: Write the Formula for the Complex
- The formula for a square planar complex is usually [MA2B2] or [MAB3].
- In this case, the chloride ligands are weak-field ligands and the ammonia ligands are strong-field ligands.
- Therefore, the formula for the complex is [Co(NH)Cl]Cl.
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One mole of complex compound Co(NH) Cl gives 3 mol of ions on dissolution in water. One mol of same complex reacts with two mol of AgNO solution to form two mol of AgCl(s). The struture of complex isa)[Co(NH)Cl]Clb)[Co(NH)cl].2NHc)[Co(NH)Cl]Cl.2NHd)[Co(NH)Cl]Cl.NHCorrect answer is option 'A'. Can you explain this answer?
Question Description
One mole of complex compound Co(NH) Cl gives 3 mol of ions on dissolution in water. One mol of same complex reacts with two mol of AgNO solution to form two mol of AgCl(s). The struture of complex isa)[Co(NH)Cl]Clb)[Co(NH)cl].2NHc)[Co(NH)Cl]Cl.2NHd)[Co(NH)Cl]Cl.NHCorrect answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about One mole of complex compound Co(NH) Cl gives 3 mol of ions on dissolution in water. One mol of same complex reacts with two mol of AgNO solution to form two mol of AgCl(s). The struture of complex isa)[Co(NH)Cl]Clb)[Co(NH)cl].2NHc)[Co(NH)Cl]Cl.2NHd)[Co(NH)Cl]Cl.NHCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for One mole of complex compound Co(NH) Cl gives 3 mol of ions on dissolution in water. One mol of same complex reacts with two mol of AgNO solution to form two mol of AgCl(s). The struture of complex isa)[Co(NH)Cl]Clb)[Co(NH)cl].2NHc)[Co(NH)Cl]Cl.2NHd)[Co(NH)Cl]Cl.NHCorrect answer is option 'A'. Can you explain this answer?.
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