Redox Reactions Flashcards
Oxidation?
Add O/e’ -ve element
Reduction reactions
Half reactions that involve gain of e’s
Oxidation reactions
Half reactions that involve loss of e’s
Reducing agent is
One that is oxidized, donates e’ to each element & helps in reducing them
Oxidizing vs reducing agent
Oxidizing agent: accept e’s
Oxidation number
It denotes oxidation state of an element based on e’ pair in covalent bond that belongs to more e’ -ve element
Rules of oxidation number
- In elements, it is 0
- Ions with 1 atom, it is = charge on it
- In H2O2,Na2O2 ‘O’ has -1
- In LiH, NaH ‘H’ is -1
- Sum of oxid. no.s = 0
- In polyatoms, Sum = total charge
Types of redox reactions
Combination
Decomposition
Displacement
Disproportiation
Displacement reaction types
Metal: metal gets displaced by another
Non-metal: H displacement
______ are very good reactants
Alkali metals & alkaline earth metals
Disproportiation?
Same element undergoes 1 oxidation & 1 reduction at same time
Oxidation _______ e’ density
Decrease
Electrode potential
Tendency of species to remain oxidised/reduced form
-ve E° means _____ reducing agent
Stronger