3 public questions tagged with this topic.
Primary valence (oxidation state) of Co is +3 (balancing 3 Cl−). Secondary valence (coordination number) is 6 (6 NH₃). Sum = 3 + 6 = 9.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Secondary valence is the coordination number. [Fe(H₂O)6]3+ has 6 ligands.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Secondary valence is the coordination number. [Cu(NH₃)4]SO₄ has 4 NH₃ ligands, giving a coordination number of 4.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
