ELECTROCHEMISTRY
Redox Reactions
Oxidation reduction reactions
Definitions
Redax reachon: A reaction involving the hansfer of elections
Oxidation: Te loss of elections (RA)
Reduction i The gain of electrons
Oxidising agent Substance that accept eleciyons
Reducing agent: Subtance that donates elecions
Anode Electrode Whore oxidation tares place
Cathode: Elaclode whore rduction takes place
Elechvolyte: A substance that can conduct elch iaty
te solution
loy forming froe ions nhan molten or dissolved in
Galvanic cll: Elecho Chemical Cell Which has self- sustaining
electadle reactions nhich result in the conversion of demical
potential enerqu to
Elecwolyhc celle Electrochemical cell which has electrode
reachons sustained loy a supply of elechcal ene gu , converting
energy into chemical potential energy
A
Elechons lost by. one reactant are received by te
, daihn ano dnRA
22 AmeSmdG
Oxidaton is 05
eacha0)
Sehutijoa idising adent COA)
G * beComes 0(e
eduction is
ga
1enchi)
USeofoxidation umbersin 1odox reachons
In tose dueaseinaxidaton mbersa
Nlb change in oidaho numlbers spectaorlons
L
(OA) reducto0 = ON deceaseS
cannonly be REACTANTS
RAoxidoooeoN
inCH0Ses
, Table of Standard Elechrode Potentials
Left to viont = Reduchion
>
Rignt to left ~ Oxidation
OA = left -hand side increase in alvength downwards
nords
RA- vigh-hand side
-D increase in swength
Step 1: Oxidation 12 reaction
need to balance 1
Step 2 Reduction 12 reaction
Step 3 Add 112 reachons
Step 4 Cancel common species.
Predicting He outcome of redox reactions
0 Spontaneous = no noad for eneray supply
(ell potential calculated (E•cell
t ten spontaneous
not spontaneous
E° cell =
Eloxidising agant - E'reduding agent s
Eocen 2 0
ShOW
spontaneous ±
the reachion is because is a better reducing agent than,
of
in the presence hill}willnot redily be
rauad to form
Redox Reactions
Oxidation reduction reactions
Definitions
Redax reachon: A reaction involving the hansfer of elections
Oxidation: Te loss of elections (RA)
Reduction i The gain of electrons
Oxidising agent Substance that accept eleciyons
Reducing agent: Subtance that donates elecions
Anode Electrode Whore oxidation tares place
Cathode: Elaclode whore rduction takes place
Elechvolyte: A substance that can conduct elch iaty
te solution
loy forming froe ions nhan molten or dissolved in
Galvanic cll: Elecho Chemical Cell Which has self- sustaining
electadle reactions nhich result in the conversion of demical
potential enerqu to
Elecwolyhc celle Electrochemical cell which has electrode
reachons sustained loy a supply of elechcal ene gu , converting
energy into chemical potential energy
A
Elechons lost by. one reactant are received by te
, daihn ano dnRA
22 AmeSmdG
Oxidaton is 05
eacha0)
Sehutijoa idising adent COA)
G * beComes 0(e
eduction is
ga
1enchi)
USeofoxidation umbersin 1odox reachons
In tose dueaseinaxidaton mbersa
Nlb change in oidaho numlbers spectaorlons
L
(OA) reducto0 = ON deceaseS
cannonly be REACTANTS
RAoxidoooeoN
inCH0Ses
, Table of Standard Elechrode Potentials
Left to viont = Reduchion
>
Rignt to left ~ Oxidation
OA = left -hand side increase in alvength downwards
nords
RA- vigh-hand side
-D increase in swength
Step 1: Oxidation 12 reaction
need to balance 1
Step 2 Reduction 12 reaction
Step 3 Add 112 reachons
Step 4 Cancel common species.
Predicting He outcome of redox reactions
0 Spontaneous = no noad for eneray supply
(ell potential calculated (E•cell
t ten spontaneous
not spontaneous
E° cell =
Eloxidising agant - E'reduding agent s
Eocen 2 0
ShOW
spontaneous ±
the reachion is because is a better reducing agent than,
of
in the presence hill}willnot redily be
rauad to form
