According to Werner's theory, the primary and secondary valencies of Cobalt in the complex are respe — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Primary valency equals the oxidation state of the central metal ion. Let the oxidation state of Co be $x$. $x + 4(0) + 2(-1) = +1 \Rightarrow x = +3$. Hence, primary valency is $3$. Secondary valency equals the coordination number, which is the number of ligand donor atoms directly attached to the metal. There are $4$ ammine ligands and $2$ chlorido ligands, making the secondary valency $4 + 2 = 6$.