How many water molecules are hydrogen bonded in the following molecular formula $[Cu(H_{2}O)_{4}]^{2+} SO_{4}^{2-} \cdot H_{2}O$?

The oxidation state and covalency of $Al$ in $[AlCl(H_2O)_5]^{2+}$ are respectively

The secondary valences (coordination numbers) of the following complexes based on their reactions with excess $AgNO_3$ are:

Formula of the complexes	Moles of $AgCl$ precipitated per mole of complex
$(I) \ CoCl_3 \cdot 6 H_2O$	$3$
$(II) \ NiCl_3 \cdot 6 H_2O$	$2$
$(III) \ Co(SO_4)Br \cdot 5 NH_3$	$1$

Find the secondary valences for $(I), (II),$ and $(III)$ respectively.

In the complex $[X(SO_4)(NH_3)_5]$,the coordination number and oxidation state of $X$ are,respectively:

In the complex $K[Cr(H_2O)_2(C_2O_4)_2] \cdot 3H_2O$,the oxidation state and coordination number of the central metal ion are . . . . . . and . . . . . . respectively.

$A$ $Pt$ complex of $NH_3$ and $Cl$ that produces four ions per molecule in an aqueous solution is: