Ligands And Complex Ions

Question 1

What is a complex ion?

Answer 1

One or more molecules or negatively charged ions bind to a central metal ion

Question 2

What is a ligand?

Answer 2

A molecule or ion donates a pair of electrons to a central metal ion to form a coordinate bond ( dative covalent bond)

Question 3

What is the coordination number?

Answer 3

The number of coordinate bonds attached to the central metal ion

Question 4

What is a monodentate ligand?

Answer 4

Donates one pair of electrons to the central metal ion to form one coordinate bond

Question 5

What is bidentate ligand?

Answer 5

Donates two lone pairs of electrons to form two coordinate bonds

Question 6

What are the two bidentate ligands?

Answer 6

1. 1,2 - diaminoethane ( en )
2. Ethanedioate ( oxalate ) ion

Question 7

What is the shape of a complex ion with 6 coordinate bonds?

Answer 7

Octahedral

Question 8

What is the shape of a complex ion with 4 coordinate bonds?

Answer 8

Tetrahedral or square planar

Question 9

Which complex ions have the square planar shape?

Answer 9

Transition metals with 8 d-electrons in their highest energy d sub shell
- Pt2+
- Pl2+
- Au3+