Ligand Substitution reaction colours

• [Cu(H2O)6]2+ (aq) + 4NH3 (aq) = [Cu(Nh3)4(H2O)2]2+ (aq) + 4H2O?

  pale blue solution to dark blue solution
• [Cu(H2O)6]2+ (aq) + 4Cl- (aq) = [CuCl4]2- (aq) + 6H2O (l)?

  pale blue solution to yellow solution
• [Cu(H2O)6]3+ (aq) + 6NH3 (aq) = [Cu(NH3)6]3+ (aq) + 6H2O (l)?

  violet to purple
• Cu 2+ (aq) + 2OH- (aq) = Cu(OH)2 (s)?

  blue precipitate
• Fe(OH)2 (s)?


  green precipitate
• Fe(OH)3 (s)?


  orange-brown precipitate
• Mn(OH)2 (s)?


  light-brown precipitate
• Cr(OH)3 (s)?


  green precipitate
• [Cr(OH)6]3- (aq)?


  dark-green precipitate
• Cu2+ (aq) + 2OH- (aq) = Cu(OH)2 (s)?


  blue ppt that dissolves in excess ammonia to form a deep blue solution of [Cu(NH3)4(H2O)2]2+
• Cr3+ (aq) + 3OH- (aq) = Cr(OH)2 (s)?

  green ppt that dissolves in excess aqueous ammonia to form [Cr(NH3)6]3+ (aq) which is a purple solution