inorganic 2 - ligand exhange

Question 1

hexaaquacobalt and ammonia?

Answer 1

[Co(H2O)6]2+ +6NH3 -> [Co(NH3)6]2+ +6H2O
pink to yellow

Question 2

hexaaquacobalt and NaOH

Answer 2

[Co(H2O)6]2+ +2OH- -> Co(OH-)2(H2O)4 +2H2O
pink to blue ppt

Question 3

hexaaquacopper and NaOH

Answer 3

[Cu(H2O)6]2+ + 2OH- -> Cu(OH-)2(H2O)4 +2H2o
blue to light blue ppt

Question 4

Cu(OH-)2(H2O)4 and ammonia

Answer 4

Cu(OH-)2(H2O)4 + 4NH3 -> [Cu(NH3)4(H2O)2]2+ + 2OH- + 2H2O
light blue ppt to deep blue sol