tutor - dblock

Question 1

give an example of transition metal used as catalyst

Answer 1

Fe
haber process(making ammonia)

Question 2

what is a transition metal

Answer 2

partially filled D-subshell
(in elemental or stable ion form)

Question 3

what d-block element is not a transition metal

Answer 3

zinc

Question 4

what industrial use do d-block elements have

Answer 4

catalysts

Question 5

why can d-block elements be used as catalysts

Answer 5

1. vacant d-orbitals can accept electron density
2. have variable oxidation states

Question 6

what does degenerate mean

Answer 6

same energy

Question 7

why are transition elements coloured

Answer 7

1. d-orbitals are degenerate
2. ligand field causes them to split
3. electron absorbs energy and jumps to vacant orbital = energy gap in visible region

Question 8

the colour light absorbed is …..

Answer 8

not observed

Question 9

the colour light not absorbed is …..

Answer 9

observed

Question 10

what are ligands

Answer 10

small molecules with lone pairs which can be donated to metals forming co-ordinate bonds(makes complexes)

Question 11

energy 1 =

Answer 11

h x f

h = planks constant
f = frequency

Question 12

energy 2 =

Answer 12

(h x c) / wavelength

h = planks constant
c = speed of light

Question 13

what are complexes

Answer 13

when ligons interact with metal ions

Question 14

what type of ligand is water

Answer 14

neutral