aqua ions Flashcards
1
Q
are 2+ or 3+ ions more acidic in solution
A
-3+ are much more acidic as they have a higher charge density
-this attracts the electrons more in the ligand, so it weakens the
O-H bond more causing the the hydrogen ions to dissociate more easily
2
Q
define a Lewis acid
A
an electron pair acceptor
3
Q
define a Lewis base
A
an electron pair donor
4
Q
what acts as a Lewis base or acid during the formation of a complex
A
-central transition metal ion is a Lewis acid and ligands act as a Lewis base
5
Q
why does the green precipitate turn brown on standing in air for the Fe2+ hexaaqua ion complex
A
because the oxygen from the air oxidises the Fe2+ into Fe3+
