Question

The oxidation state and co-valency of $Al$ in $\left[AlCl\right(H_{2}O{)}_5{]}^{2+}$ , respectively are:

• A. $6,6$
• B. $3,6$
• C. $2,6$
• D. $3,3$

Answer 1

Answer: (B)

$3,6$

Oxidation state of Aluminum in $\left[AlCl\right(H_{2}O{)}_5{]}^{2+}$ is as follows:

$x+(-1)+5\left(0\right)=+2$

$x=+3$

where aluminum is bonded to 6 ligands ($5H_{2}O+1C{l}^{-}$), so its covalency is 6.

Option B is correct.