Transition Metals

HideShow resource information
  • Created by: Sopha8
  • Created on: 01-06-15 20:18
Define transition metal
A metal which can form one or more stable ions with a partially filled d-subshell
1 of 17
Define complex
a transition metal bonded to one or more ligand by dative covalent bonds
2 of 17
Wha happens to the electron configuration of a transition metal when it becomes an ion?
form positive ions, electrons are removed from 4s sub shell before 3d
3 of 17
What are the chemical propertise of transition metals?
1-form complex ions 2-form coloured ions 3-good cataylsts because they have variable oxdidation states
4 of 17
What is a ligand? what are the different types and examples of each?
donates lone pair of electron to central metal ion. can be unidentate (NH3, Cl-), bidentate or multidentate (EDTA4-)
5 of 17
What is a coordiantion number and what does it mean for the shape of the ion?
number of coordinate bonds formed with metal ion. if 2 shape=linear, 3=square planar or tetrahedral and 6=octahedral
6 of 17
Draw the structure of haemoglobin as deoxyhaemoglobin and oxyhaemoglobin
:
7 of 17
Why are complex ions coloured?
lingands split the 3d orbitals into 2 energy levels, when visible light hits some frequiencies are absorbed so the electrons jump up to higher level, others are reflected so this is the colour you see
8 of 17
How do you work out how much energy is absorbed for electrons to move to higher energy level? what affects the value?
E=hv E=energy absorbed, h=planck's constant, v=frequency of light absorbed. affected by: central metal ion, oxidation state, ligands and coordination number
9 of 17
How does spectrometery determine the concentration of a solution?
white light passed through filter (colour thats absorbed) through sample to colorimeter. more light absorbed=more concentrated
10 of 17
What is a lewis acid and base?
acid=electron pair acceptor base=electron pair donor
11 of 17
What is the equation for chromate and dichromate ions in equlibrium?
:
12 of 17
Which is more easier to oxidise? what is the product of oxidation?
:
13 of 17
Write 2 titration reaction equations with Fe2+ ions
:
14 of 17
What is catalyst poisoning?
imputies bind to active site on surface of hetrogenous catalyst so reduces surface area for reactants to be absorbed, slows reaction
15 of 17
How does cis-platin treat some cancers?
forms coordinate bonds with N in DNA preventing the double helix structure from unwinding
16 of 17
What affects complex ion stability?
1-multidentate ligands from more stable complex as entropy change, increasing number of paricles means more stability (chelate effect) 2-strength of coordinate bond 3-enthalpy change, bonds broken similar strength to bonds being made
17 of 17

Other cards in this set

Card 2

Front

Define complex

Back

a transition metal bonded to one or more ligand by dative covalent bonds

Card 3

Front

Wha happens to the electron configuration of a transition metal when it becomes an ion?

Back

Preview of the front of card 3

Card 4

Front

What are the chemical propertise of transition metals?

Back

Preview of the front of card 4

Card 5

Front

What is a ligand? what are the different types and examples of each?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Transition metals resources »