Question

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at $25^{\circ } C$?

• A. ${CoCl3.5NH3 }$
• B. ${ CoCl3.6NH3 }$
• C. ${ CoCl3.3NH3}$
• D. ${ CoCl3.4NH_3}$

Answer 1

Answer: (C)

${ CoCl3.3NH3}$

Answer 2

Octahedral complex means it contains ‘6’ coordinate bond. In ${CoCl_3.3NH_3, ‘Cl’}$ cannot be outside from coordination sphere