Need To Know Flashcards
electronegativity
the ability of an atom to attract the pair of electron in a covalent bond
what factors affect electronegativity
CRAM
charge raidus attraction and shielding ie
Cl2 AND WATER HYDROCHLORIC ACID and chloric acid
Cl2 + H2O –> 2H+ + CL- + HClO + ClO-/HCl
relative atomic mass
Mean mass of one atom /
1/12 mass of one atom of C12
whats makes a tranistion metal and what it defing feutures?
incomplete d subshell forms colour ions variable oxidation state catlystic abilities complex formations
whats a ligand (bidentate lingand)
(2) atom dontates a (2) lone pair and forms (2) co-od bond
why is reaction feable for transition metals changing chelate effect/.
more moles in products = increasing entropy
same no. bond broken and formed enthalpy change small
there gibs freee energy is negative as small number ets
4 shapes of transition metals
any comon octohedral
cl- ligand tetrahedral
pt as metal square [lanar
ag metal linear
trans isomerism in cisplatin and an octahdral
basic knowldege hoe
optical isomers tm
octerhedral with 3x bidentate ligand
what causes colour change in anion metal thing
change in oxidation state
co oc no.
ligand
change in shape
equations which link the colour, wavelength and
frequency of the light absorbed with the energy
differ beteeen split orbitals
ΔE = hv or ΔE = hc/λ v = frequency of light absorbed (unit s-1 or Hz) H = Planck’s constant 6.63 × 10–34 (J s) E = energy difference between split orbitals (J) c = speed of light 3.00 x 108 (m s–1) λ = wavelength of light absorbed (m)
VO2 + Oxidation state +5
VO 2+ Oxidation state + 4
V3+ Oxidation state + 3
V2+ Oxidation state + 2
Yellow
blue
green
violet
what do u need to know about EDTA4 as a ligand
EDTA4- can form six coordinate bonds; two coordinate bonds form from the N atoms, and four coordinate bonds form the O- atoms.
What do you need to know about haemoglobin
O2 forms a co-ordinate bond to Fe2+ in haemoglobin enabling oxygen to be transported in the blood.
CO is toxic because CO bonds more strongly to the Fe2+ in haemoglobin.
This prevents O2 from bonding to the Fe2+, causing suffocation.