Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give…

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25oC?
  1. CoCl3⋅3NH3
  2. CoCl3⋅4NH3
  3. CoCl3⋅5NH3
  4. CoCl3⋅6NH3

Solution

In CoCl3⋅3NH3 the complex can be written as [CoCl3NH33]
With Co3+ oxidation state 3, Cl- ions & 3, NH3 molecules be with in the co-ordination sphere Co - Cl bonds in co-ordination sphere not ionisable.

Asked in: MHT CET Full Test 11

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