Using IUPAC norms write the formulae for the following:
(a) Potassium trioxalatoaluminate (III)
(b) Dichloridobic (ethane-1,2-diamine)cobalt(III)

Explanation

(a) `K[Al(o x)_(3)]^(x)" "(b)[CoCl_(2)(en)_(2)]`
`x=3+(-2)xx3=x=-3`
Formulae: `K_(3)[Al(o x)_(3)]`