Transition Metals Chromium

Question 1

[Cr(H2O)6]3+
Metal ion-
Ligand-
Colour-

Answer 1

Metal ion- Chromium (III)
Ligand- Water
Colour- ruby

Question 2

[Cr(NH3)6]3+
Metal ion-
Ligand-
Colour-

Answer 2

Metal ion- Chromium (III)
Ligand- Ammonia
Colour- Purple

Question 3

[Cr(H2O)3(OH)3]
Metal ion-
Ligand-
Colour-

Answer 3

Metal ion- Chromium (III)
Ligand- Water and hydroxide ions
Colour- Green ppt.

Question 4

[Cr(OH)6]3-
Metal ion-
Ligand-
Colour-

Answer 4

Metal ion- Chromium (III)
Ligand- Hydroxide ions
Colour- Green

Question 5

[Cr(H2O)6]2+
Metal ion-
Ligand-
Colour-

Answer 5

Metal ion- Chromium (II)
Ligand- Water
Colour- Blue

Question 6

CrO42-
Metal ion-
Ligand-
Colour-

Answer 6

Metal ion- Chromium (VI)
Ligand- N/A
Colour- Yellow

Question 7

Cr2O72-
Metal ion-
Ligand-
Colour-

Answer 7

Metal ion- Chromium (VI)
Ligand- N/A
Colour- Orange