Transition metals harrddd

Question 1

[Cu(H2O)6] 2+

Answer 1

Pale blue

Question 2

Cu(OH)2 (s)

Answer 2

Pale blue ppt

Question 3

[Mn(H2O)6] 2+

Answer 3

Pale Pink

Question 4

Mn(OH)2 (S)

Answer 4

Pale Brown Ppt

Question 5

[Fe(H2O)6] 2+

Answer 5

Pale Green

Question 6

Fe(OH)2 (s)

Answer 6

Dark green ppt

Question 7

Fe (OH)3 (s)

Answer 7

orange brown ppt

Question 8

[Fe(H2O)6]3+

Answer 8

yellow

Question 9

[Cr (H2O)6] 3+

Answer 9

Violet

Question 10

Cr (OH)3 (s)

Answer 10

Grey green ppt

Question 11

When Cr(OH)3 (s) is dissolved in excess NaOH?

Answer 11

grey green to Dark green sol [Cr(OH6] 3-

Question 12

when Cu(OH)2 (s) is dissolved in excess NH3?

Answer 12

Blue ppt to dark blue solution
[Cu(NH3)4 (H2O)2] 2+

Question 13

When Cr(OH)3 (s) is dissolved in excess NH3?

Answer 13

grey green to purple [Cr(NH3)6] 3+

Question 14

Ligand substitution compounds:
Pre substitution

Answer 14

[Cu(H2O)6] 2+ with Cl- and NH3
[Cr(H2O)6] 3+ with NH3

Question 15

Ligand substitution:
[Cu(H2O)6] 2+ and NH3

Answer 15

Pale blue ppt, Cu(OH)2
In excess NH3 dissolves to form dark blue [Cu (NH3)4(H2O)2] 2+

Question 16

Ligand substitution:
[Cu(H2O)6] 2+ and Cl-

Answer 16

Yellow ppt, tetrahedral [Cu(Cl)4]2-

Question 17

Ligand substitution:
Cr(H2O)6] 3+ and NH3

Answer 17

Pale purple to grey green ppt
Cr(OH)3 (s)

With excess, ppt dissolves to dark purple [Cr(NH3)6]3+