Hello,
I thought the answer for the question attached was:
[Al(H2O)6]3+ + 3H2NCH2CH2NH2 --> [Al(H2NCH2CH2NH2)3]3+ + 6H2O
Is there a reason why you're not meant to use ligand substitution here? The question even mentions that H2NCH2CH2NH2 can act both as a base and ligand. Perhaps I am missing something important in the question?
Any help is much appreciated
Thank you
Aluminium hexa aqua ion is acidic - so it will react with bases such as OH/NH3.
When it forms a precipitate (Al(OH)3) - the precipitate is amphoteric.
It can still continue reacting with bases but this time it will only react with OH (strong bases) - and redissolve
Therefore, with NH3 and Amine ligands, it will only react until it forms a precipitate and wont react further.
However, Cu2+ CAN react further with excess NH3 and amine ligands.
look at the table below. hopefully it should help you memorise the reactions.
