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(A) The complex $CoCl_3(NH_3)_4$ acts as a $1:1$ electrolyte,which means it dissociates into two ions in solution. This indicates the formula is $[Co(

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$3$

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(A) The complex $CoCl_3(NH_3)_4$ acts as a $1:1$ electrolyte,which means it dissociates into two ions in solution. This indicates the formula is $[Co(NH_3)_4Cl_2]Cl$. The primary valency of the central metal ion $(Co)$ corresponds to its oxidation state. In $[Co(NH_3)_4Cl_2]Cl$,let the oxidation state of $Co$ be $x$. $x + 4(0) + 2(-1) + 1(-1) = 0$ $x - 3 = 0$ $x = +3$. Therefore,the primary valency is $3$.

The conductivity of a solution of a complex with the formula $CoCl_3(NH_3)_4$ corresponds to a $1:1$ electrolyte. What is the primary valency of the central metal ion?

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