1.6.5 & 1.6.6: Redox Flashcards
Redox pneumonic
OLIRIG
OLIRIG
stands for
oxidation is loss reduction is gain
Oxidation state
How many electrons an atom has lost or gained
Overall oxidation state
charge on an ion
Oxidation state
electron pair rule
pretend every bond is ionic
which element will take the electron pair?
= the most electronegative one
Oxidation states
rules/exceptions
if fluorine and oxygen together
= fluorine takes priority
oxygen is -2 except in peroxides = -1
hydrogen has a +1 OS except in metal hydrides = -1
Oxidation state
combined oxygen
-2
Oxidation state
combined hydrogen
+1
Oxidising agent
A compound that gains electrons and is reduced by taking them from another compound.
(oxides something else)
Reducing agent
A compound that donates electrons and is oxidised by losing electrons to another compound.
(reduces something else)
Electrons on side of reactants
reduction
Electrons on side of products
oxidation
