Question 1
Which one of the following could be a chelating ligand?
◦ NH
3 ◦ CH
3-CH
2-NH
2 ◦ NH
2-CH
2-CH
2-NH
2 ◦ CN
- ◦ any metal ion
Question 2
Why is an aqueous solution of Fe
3+ acidic?
◦ Iron ions attract hydroxide ions from water leaving hydrogen ions.
◦ Iron ions react with water to produce hydrogen ions.
◦ Iron ions attract water molecules to form a complex.
◦ Iron ions form a complex with water then lose hydrogen ions from its water ligands.
◦ Iron ions force the dissociation of water.