23.2.1 Complexes Ligands Flashcards
Fe(NO3 )3 in aqueous solution dissociates into Fe3+ and nitrate ions. Na+, when in aqueous solution, reacts with water molecules in a manner different from Fe3+. Which statement about these events is not correct?
The bonding between Na+ and its ligands in aqueous solution is much stronger than the bonding between Fe3+ and its ligands in aqueous solution.
Which statement about coordination compounds is not correct?
A coordination compound is defined by a transuranium element at the center of a set of ligands.
EDTA is a polydentate ligand. One EDTA molecule is essentially equivalent to two ammonia molecules (NH3 ) and four acetate ions (CH3COO− ). If EDTA is added to a solution of ammonia molecules and acetate ions acting as ligands on a metal, the EDTA will replace the ammonia molecules and acetate ions.
Which statement about this reaction is not correct?
The components products (EDTA-metal complex + EDTA pieces) of the reaction are more ordered than the reactants (EDTA + ammonia-acetate-metal complex), because the ligands were liberated from the complex.
Which of the following statements about the coordination complexes [ Fe(CN)6 ]3− or WCl2(PH3 )4CO are not correct?
In WCl2(PH3 )4CO, the non-neutral components are W, Cl, and CO.
Which of the following statements best define what a ligand is?
A ligand is a molecule or ion that bonds to a metal through a process by which the ligand donates a lone pair of electrons.
Which of the following is not a common ligand?
Fe3+
Which of the following statements about coordination compounds is not correct?
Most coordination compounds contain more than one type of transition metal at the center of the compound.
Which of the following statements about ligands and coordination compounds is not correct?
The oxalate ion is an example of a monodentate ligand.
Look at the diagrams for [Co(en)3 ]3+ and Fe(EDTA).
Which statement about these polydentate ligand complexes is not correct?
In the Fe(EDTA) complex, the iron ion is surrounded by two polydentate ligands (EDTA).
Which statement about the behavior of Fe3+ or Na+ in aqueous solution is incorrect?
Each Fe3+ ion bonds to three H2O molecules (i.e., ligands).
