Question

The IUPAC name for `[A](OH_(2))_(5)(OH)]^(+2)` is
A. aquametaalumination ion
B. pentahydroaluminium hydroxide
C. pentaaquahydroxidoaluminium (III) ion
D. pentaaquaaluminate (III) hydroxide

Answer 1

Correct Answer - C
Within a complex ion the ligands `(OH^(-)` and `H_(2)O)` are named first, in alphabetical order and the metal ion is named last. Anionic ligands with endings - ide are changed to - ido. Finally the oxidation number of the central metal is written in Raman numerals following the name of the metal.