Complex ions

Question 1

What is a complex ion?

Answer 1

A metal ion surrounded by co-ordinately bonded ligands

Question 2

What is a co-ordinate bond?

Answer 2

Covalent bond where both electrons come from the same atom

Question 3

What is a ligand?

Answer 3

An atom, ion or a molecule that donate a pair of electrons to a central metal ion

Question 4

What is a mono dentate ligand?

Answer 4

Ligands that can only form one co-ordinate bond

Question 5

What is a bidentate ligand?

Answer 5

Ligands that can only form two co-ordinate bonds

Question 6

What is a multi dentate ligand?

Answer 6

Ligands that can form more than 2 co-ordinate bonds

Question 7

What are some examples of a mono dentate ligands?

Answer 7

Ammonia
Chloride ions
Water

Question 8

What is an example of a multi dentate ligand?

Answer 8

EDTA4-

Question 9

What is an example of a bidentate ligand?

Answer 9

Ethane-1,2-diamine (NH2CH2CH2NH2)

Question 10

How do you work out the oxidation state of a metal ion?

Answer 10

Total charge of complex - the sum of the charges of the ligands

Question 11

What is the co-ordination number?

Answer 11

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

Question 12

What shape does a complex ion with 6 co-ordinate bonds have?

Answer 12

Octahedral

Question 13

What shapes can a complex ion with 4 co-ordinate bonds form?

Answer 13

Tetrahedral

Square planar

Question 14

What is an example of an octahedral complex ion?

Answer 14

[Fe(H2O)6]2+

Question 15

What is an example of a tetrahedral complex ion?

Answer 15

[CuCl4}2-

Question 16

What is an example of a square planar complex ion?

Answer 16

[PtCl2(NH3)2]

Question 17

What shape does a complex ion with 2 co-ordinate bonds have?

Answer 17

Linear

Question 18

What is an example of a linear complex ion?

Answer 18

[Ag(NH3)2]+