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So If a complex has a net negative charge, you would add ate at the end of the metal name. Can someone explain why for K3[CoF6] becomes potassium-hexa-flouro-cobaltate (III).Why are we adding "ate" to cobalt. Where does the negative charge come from?
Since you have 3 K+ cations, you have to balance the 3+ charge to get a neutral net charge. So the anion, which is the coordination compound in this case, has to have a charge of 3-.
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