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  4. Primary valency of Co in [Co(en)2Cl2] Cl is

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Q. Primary valency of $ Co $ in $ [Co(en)_2Cl_2]\, Cl $ is

AMUAMU 2017

Solution:

Primary valency is the oxidation state of the central metal ion.
Let, oxidation state of $Co$ in $[Co(en)_2Cl_2] Cl$ be $x$.
$x +2 (0 ) + 2 (-1) - 1 = 0$
$\therefore x= + 3$
$\therefore $ Primary valency of $Co = + 3$