Of the following complex ions: [CrCl(NH₃)₅]^2+,[Cr(NH₃)₆]³⁺,[CrCl(H₂O)₅]²⁺,[Cr(H₂O)₆]³⁺,one appears pink,one yellow,one blue-green and one violet.Which is blue-green? A)[Cr(NH₃)₆]³⁺ B)[CrCl(NH₃)₅]²⁺ C)[CrCl(H₂O)₅]²⁺ D)[Cr(H₂O)₆]³⁺ E)both [CrCl(H₂O)₅]²⁺and [CrCl(NH₃)₅]²⁺

Question

Quizplus · Accepted Answer

The blue-green color is likely due to the presence of the chloride ligand. Therefore, the complex ion that contains both a chloride ligand and a colored ligand (H₂O) is most likely to appear blue-green. This leaves option C, [CrCl(H₂O)₅]²⁺, as the best choice.

Of the Following Complex Ions: [CrCl(NH3)5]2+,[Cr(NH3)6]3+,[CrCl(H2O)5]2+,[Cr(H2O)6]3+,one Appears Pink,one Yellow,one Blue-Green

Of the Following Complex Ions: [CrCl(NH₃)₅]^2+,[Cr(NH₃)₆]³⁺,[CrCl(H₂O)₅]²⁺,[Cr(H₂O)₆]³⁺,one Appears Pink,one Yellow,one Blue-Green