A Coordination compound is represented by the formula [ CoBr ₃(e n) x] . This compound required one mole of AgNO ₃ to form a pale yellow precipitate of AgBr . What is the value of x in the compound?

Step-by-step solution

The coordination compound is given as [CoBr₃(en)x] . The reaction with AgNO₃ produces a pale yellow precipitate of AgBr , which indicates that one bromide ion is present outside the coordination sphere as a counter ion. The reaction can be represented as [CoBr₂(en)x]Br + AgNO₃ [CoBr₂(en)x]NO₃ + AgBr(s) . The coordination number of Cobalt(III) in such complexes is typically 6. The ethylenediamine (en) ligand is bidentate, occupying 2 coordination sites. Let the number of bromide ions inside the coordination sphere b