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[co(en)(nh3)cl3]br why is 3+ and not +4
Accepted Answer
The complex ion [Co(en)(NH3)Cl3] has a +3 charge because cobalt (Co) is in its +3 oxidation state. Here's why:
Ligands: The ligands in the complex are ethylenediamine (en), ammonia (NH3), and chloride (Cl). These ligands are neutral or have a negative charge.
Ethylenediamine (en): This bidentate ligand has a neutral charge.
Ammonia (NH3): Ammonia is a neutral ligand.
Chloride (Cl): Chloride is a monodentate ligand with a -1 charge.
Overall Charge: Since there are three chloride ions (-3 charge), the overall charge of the complex ion needs to be +3 to balance the charge of the bromide anion (Br-) outside the square brackets.
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