Calculate the number of metal cations which form octahedral complex with excess - Chemistry - Coordination Compounds

Question

Calculate the number of metal cations which form octahedral complex
with excess??????

Goutam Pradhan · Accepted Answer

Solution:
Cu+2 +
4CN-→[Cu(CN)4]2-
Fe+2 +
6CN-→[Fe(CN)6]4-
Fe+3 +
6CN-→[Fe(CN)6]3-
Co+3 +
6CN-→[Co(CN)6]3-
Ag+ +
2CN-→[Ag(CN)2]-
Zn+2 +
4CN-→[Zn(CN)4]2-
3 metal ion forms octahedral complexes with CN-

Calculate the number of metal cations which form octahedral complex with excess??????