Ligand substitution reactions

Question 1

Definition of ligand substitution

Answer 1

Reaction in which one ligand in a complex ion is replaced by another ligand

Question 2

Equation of Copper(II) and ammonia

Answer 2

[Cu(H2O)6]2+(aq) +4NH3(aq) —> [Cu(NH3)4(H2O)2]2+(aq) + 4H20(l)

Question 3

observation of Copper(II) and ammonia

Answer 3

Pale blue solution —> pale blue precip. Cu(OH)2 —> dark blue solution

Question 4

Equation of Copper(II) and chloride ions

Answer 4

[Cu(H2O)6]2+(aq) + 4Cl-(aq) <—> [CuCl4]2-(aq) + 6H2O(l)

Question 5

Observation of copper(II) and chloride ions

Answer 5

Pale blue solution —> green intermediate —> yellow solution

Question 6

Equation of Chromium(III) and ammonia

Answer 6

[Cr(H2O)6]3+(aq) + 6NH3(aq) —> [Cr(NH3)6]3+(aq) + 6H2O(l)

Question 7

Observation of chromium(III) and ammonia

Answer 7

Violet solution —> grey-green precip. Cr(OH)3 —> purple solution