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Postby bellaha4F » Thu Dec 05, 2019 9:55 pm

in the naming examples sheet on lavelle's website it says K3[CoF6] is potassium-hexa-fluoro-cobaltate(III). I was assuming the net charge of this is 0 because it doesn't say otherwise, so why is it cobaltate?

Venus_Hagan 2L
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Re: cobaltate

Postby Venus_Hagan 2L » Thu Dec 05, 2019 9:59 pm

It will be cobaltate because the complex overall has a negative charge. The F6 gives it a -6 charge and the K3 is a plus 3 charge. That means for the entire coordination compound to be neutral then cobalt is a +3. Despite the cobalt itself having a positive charge, the complex or what's in brackets has an overall -3 charge and you have to add -ate.

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