Transition metal colours and properties

Question 1

What are the 3 properties of transition metals?

Answer 1

-They are coloured ions
-Good catalyst
-variable oxidation states

Question 2

What are the 2 exceptions in transition metals?

Answer 2

Copper and chromium

Question 3

What is the rule for copper and chromium?

Answer 3

-4s orbital is filled completely then 3d

Question 4

What ion is always the same colour regardless to what is added to it?

Answer 4

Fe2+

Question 5

What is the colour of each metal aqua ion
Cr3+
Fe2+
Fe3+
Mn2+
Cu2+

Answer 5

Violet
Green
Yellow
Pale pink
Blue

Question 6

What is the colour of Each ion when they have OH- added or Nh3 added?
Cr3+
Fe2+
Fe3+
Mn2+
Cu2+

Answer 6

Green
Green
Brown
Pale brown
Blue

Question 7

What is the colour of Each ion when they have excess OH- added or excess Nh3 added?
Cr3+
Fe2+
Fe3+
Mn2+
Cu2+

Answer 7

Cr3+ with excess OH- is green although with NH3 is purple
Green
brown
pale brown
Cu2+ is blue with excess OH- but with excess NH3 is dark blue

Question 8

write the full equation with charges and state symbols of hexaaquacopper + ammonia

Answer 8

[Cu(H2O)6]2+ + 4NH3 -> [Cu(NH3)4(H2O)2]2+ + 4H2O
-All compounds are (aq) but water is liquid

Question 9

write the full equation with charges and state symbols of hexaaquacopper + Chloride ion

Answer 9

[Cu(H2O)6]2+ + 4Cl- -> [CuCl4]2- + 6H2O
-All compounds are (aq) but H20 is liquid

Question 10

write the full equation with charges and state symbols of hexaaquachromium + ammonia

Answer 10

[Cr(H2O)6]3+ + 6NH3 -> [Cr(NH3)6]3+ + 6H2O
–All compounds are (aq) but H20 is liquid