Question

Give the primary and secondary valencies of cobalt in the coordination compound [Co(NH₃)₆]Cl₃.

Answer 1

[Co(NH₃)₆]Cl₃. According to Werner theory the ionizable sphere consists of entities which satisfy the primary valency. For cobalt primary valency  = 3. The entities present in coordination sphere satisfy the secondary valency. For cobalt secondary valency  =  6.