The number of water molecule $(s)$ not coordinated to copper ion directly in $CuSO_4 \cdot 5H_2O$ is

One mole of the coordination compound $Co(NH_3)_5Cl_3$ gives $3$ moles of ions upon dissolution in water. Furthermore,one mole of this complex reacts with $2$ moles of $AgNO_3$ solution to produce $2$ moles of $AgCl(s)$. The structure of the complex is:

What is the coordination number of cobalt in $[Co(NH_3)_3Cl_3]$?

Explain the following term with an example: Bidentate ligands.

$A$ complex compound of $Co^{3+}$ with molecular formula $CoCl_{x} \cdot yNH_3$ gives a total of $3$ ions when dissolved in water. How many $Cl^{-}$ ions satisfy both primary and secondary valencies in this complex?

$A$ ligand can also be regarded as