The primary valence of the metal ion in the c | vedclass

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(C) The primary valence of a metal ion in a coordination compound corresponds to its oxidation state. For the complex $K_2[Ni(CN)_4]$,let the oxidatio

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$2$

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(C) The primary valence of a metal ion in a coordination compound corresponds to its oxidation state. For the complex $K_2[Ni(CN)_4]$,let the oxidation state of $Ni$ be $x$. The oxidation state of $K$ is $+1$ and $CN$ is $-1$. Setting the sum of oxidation states equal to zero: $2(+1) + x + 4(-1) = 0$. $2 + x - 4 = 0$. $x - 2 = 0$. $x = +2$. Thus,the primary valence of $Ni$ is $2$.

The primary valence of the metal ion in the coordination compound $K_2[Ni(CN)_4]$ is

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