Complex Ions

Question 1

Complex

Answer 1

A central metal atom or ion surrounded by co-ordinately bonded ligands

Question 2

Co-ordinate bond

In a complex?

Answer 2

A covalent bond in which both electrons in the shared pair come from the same atom.

They come from the ligands

Question 3

Ligand

Answer 3

An atom, ion or molecule that donates a pair of electrons to a central transition metal ion to form a co-ordinate bond

Question 4

Co-ordination number

Usual numbers

Answer 4

The number of co-ordinate bonds that are formed with the central metal ion.

6 and 4

Question 5

Shape and bond angle of six co-ordinate bonds

Answer 5

Octahedral shape.

90 degree bond angles

Question 6

Two types of shapes and bond angles of four co-ordinate bonds

Answer 6

Usually tetrahedral and 109.5 degree bond angles.

Can form square planar and 90 degree bond angles

Question 7

Shape and bond angle of silver complexes with two co-ordinate bonds

Answer 7

Linear shape.

180 degree bond angles

Question 8

Oxidation State of the Metal Ion

Answer 8

The total oxidation state - the sum of the oxidation states of the ligands