The primary and secondary valencies of cobalt | vedclass

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(D) In the complex $[Co(NH_3)_5Cl]Cl_2$,the oxidation state of $Co$ is calculated as: $x + 5(0) + 1(-1) = +2$,so $x = +3$. Primary valency corresponds

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$3$ and $6$

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(D) In the complex $[Co(NH_3)_5Cl]Cl_2$,the oxidation state of $Co$ is calculated as: $x + 5(0) + 1(-1) = +2$,so $x = +3$. Primary valency corresponds to the oxidation state of the central metal atom,which is $3$. Secondary valency corresponds to the coordination number,which is the total number of ligands directly bonded to the central metal atom. Here,$5$ $NH_3$ molecules and $1$ $Cl^-$ ion are bonded,so the coordination number is $5 + 1 = 6$. Thus,the primary and secondary valencies are $3$ and $6$ respectively.

The primary and secondary valencies of cobalt respectively in $[Co(NH_3)_5Cl]Cl_2$ are :

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