Transition Metals

Question 1

What is an other name for a lone pair

Answer 1

Dentate.
Monodentate has one lone pair
Bidentate two

Question 2

Colour of Vanadium

Answer 2

+5 Yellow VO2 +
+4 Blue VO 2+
+3 Green V 3+
+2 Violet V 2+

Question 3

Chromium Colours

Answer 3

+6 Orange Cr2O7 2-
+6 Yellow CrO4 2-
+3 Green/Violet Cr 3+
2+ Blue Cr 2+

[Cr(H2O)6] 3+ dark green
[Cr(NH3)6] 3+ Purple

Question 4

Iron Colours

Answer 4

Fe 3+ Yellow
Fe 2+ Green

[Fe(H2O)4(OH-)2] green ppt
[Fe(H2O)3(OH-)3] orange ppt

Question 5

Colour Colbalt

Answer 5

Co 2+ pink

[Co(H2O)6] 2+ Pink
[Co(Cl)4] 2- Blue
[Co(H2O)4(OH-)2] blue ppt
[Co(NH3)6] 2+ yellow

Question 6

Copper colour

Answer 6

Cu 2+ blue

[Cu(H2O)6] 2+ pale blue
[Cu(H2O)2 (NH3)4] 2+ deep blue
[Cu(H2O)4(OH-)2] Blue ppt
[Cu(Cl)4] 2- yellow