Transition Elements

Question 1

What are transition elements?

Answer 1

D-block elements that form at least 1 ion with a partially filled d-orbital

Question 2

3 main properties of transition metals

Answer 2

1) varying oxidation states
2) form coloured compounds
3) used as catalysts

Question 3

Ligand

Answer 3

Molecules that can donate a pair of electrons to a central metal ion to form a dative covalent bond

Question 4

Complex ion

Answer 4

An ion formed when 1 or more molecules w/ a -ve charge/lone pair bond to a central metal ion

Question 5

Examples of square planar complexes

Answer 5

Platinum, palladium + gold

Question 6

[Cu(H2O)6]colour and charge

Answer 6

Pale blue

2+

Question 7

[Cr(H2O)6]

Answer 7

Violet

3+

Question 8

[Cr(H2O)5SO4]

Answer 8

Green

+

Question 9

Cu2+

Colour in sol and ppt

Answer 9

Blue

Blue

Question 10

Fe2+

Colour in sol and ppt

Answer 10

Green

Green

Question 11

Fe3+

Colour in sol and ppt

Answer 11

Yellow sol

Orange/brown

Question 12

Mn2+

Colour in sol and ppt

Answer 12

Pink

Brown

Question 13

Cr3+

Colour in sol and ppt

Answer 13

Green

Grey green

Question 14

Half eqt for MnO4-/Fe2+

Answer 14

MnO4- + 5e + 8H -> Mn2+ + 4H2O

Fe2+ -> Fe3+ + e

Question 15

Ni2+

Answer 15

Green

Green

Question 16

Where do square planar shapes occur in complex ions?

Answer 16

Transition metals with 8 d-electrons