Which one is the correct formula for the coor | vedclass

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(B) The central metal ion is cobalt in the $+3$ oxidation state,denoted as $Co(III)$.Ethane-$1,2$-diamine $(en)$ is a neutral bidentate ligand.Since t

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$[Co(en)_3]_2(SO_4)_3$

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(B) The central metal ion is cobalt in the $+3$ oxidation state,denoted as $Co(III)$.Ethane-$1,2$-diamine $(en)$ is a neutral bidentate ligand.Since there are three $en$ ligands,the coordination sphere is $[Co(en)_3]^{3+}$.Sulphate ion is $SO_4^{2-}$.To balance the charges,we use the criss-cross method: $2$ units of $[Co(en)_3]^{3+}$ and $3$ units of $SO_4^{2-}$ are required to make the compound neutral.Thus,the formula is $[Co(en)_3]_2(SO_4)_3$.

Which one is the correct formula for the coordination compound tris(ethane-$1,2$-diamine) cobalt$(III)$ sulphate?

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