OIL RIG
oxidation is loss e reduction is
of gain of
e
Morereactive metals will lessreactive metals will
lose e more e more readily gain
readily
Electrochemical Cells
half cell A halfcell is a metaldippinginto a metal salt soln
electrochemicalcell
halfcell halfcell
always reduction
higesistance
Etda ᵈʰtn In salt bridge Cn theelectrode
1Mof221
Callye1m Cust12 Cn IM Cust soln
halfcell half cell
Observations
Zinc dissolves
at 2nelectrode Zn 2n E Observation at Cu electrode
Freshcopperformingon electrode
massof Zincelectrodedecrease 2n Cut 2121Cu
Forms a circuit as ve electrode will release é to positive electrode
allows tocalculate potential difference lemf
emf The emf is the potential differencemeasured when two halfcells
are connected
Salt bridge
Madeof
of
a piece filterpapersoaked in solnofconc potassium nitrate Of
a Utube conc
containing
chloride dissolved in
potassium gelatine
Function
allowions topass betweensolns allowingconduction Wireis notusedtoconnect
of electricity I so completes circuit halfcells toavoidfurther
metallionpotentialsinthecircuit
2 halfcellbyproviding
maintainselectricalneutrality in each
ie doesnahinterferewith
cations anions whichwillreplace thoseconsumed at the
l
electrode
if the
currentis allowedto flow
, Conventional cell representation
LMS RHS electrode reduction
Entro fidgeting 2 Must
aug cag I Cness
Fest e Fearags 0.770 T.mn
eg cap
Tfroa
d12cc Clzigs says 1 360 Rus electrod
Overall
Egn 2ft Cly 2Fe 2C
i
Pycsilfetcappf.gg
iron ions insamestate ins 4291gal
d no solidelectrodetherefore Cly is used not a solid
Pt is used
doffhange a
gas I therefore
so Pt as it is a solid
Standardelectrode potentials
Standard electrodepotential the potential differencemeasured when a half all
is connected to thestandard hydrogen electrode
by
represented E understandardconditions
measured volts
in V
To measure this halfcell mustbe connected tostandard hydrogen electrode via
high resistance voltmeter I salt bridge
Conditions hydrogen electrode
of
Pt electrode
inert goodconductor 421A
atlook
E
S
sisterof
e
Imoldm3 Hydrogen
into
Hydrogen gas at 100 kPa pressure 298k
Temperature at 298K
IM Mt
Pt electrode
oxidation is loss e reduction is
of gain of
e
Morereactive metals will lessreactive metals will
lose e more e more readily gain
readily
Electrochemical Cells
half cell A halfcell is a metaldippinginto a metal salt soln
electrochemicalcell
halfcell halfcell
always reduction
higesistance
Etda ᵈʰtn In salt bridge Cn theelectrode
1Mof221
Callye1m Cust12 Cn IM Cust soln
halfcell half cell
Observations
Zinc dissolves
at 2nelectrode Zn 2n E Observation at Cu electrode
Freshcopperformingon electrode
massof Zincelectrodedecrease 2n Cut 2121Cu
Forms a circuit as ve electrode will release é to positive electrode
allows tocalculate potential difference lemf
emf The emf is the potential differencemeasured when two halfcells
are connected
Salt bridge
Madeof
of
a piece filterpapersoaked in solnofconc potassium nitrate Of
a Utube conc
containing
chloride dissolved in
potassium gelatine
Function
allowions topass betweensolns allowingconduction Wireis notusedtoconnect
of electricity I so completes circuit halfcells toavoidfurther
metallionpotentialsinthecircuit
2 halfcellbyproviding
maintainselectricalneutrality in each
ie doesnahinterferewith
cations anions whichwillreplace thoseconsumed at the
l
electrode
if the
currentis allowedto flow
, Conventional cell representation
LMS RHS electrode reduction
Entro fidgeting 2 Must
aug cag I Cness
Fest e Fearags 0.770 T.mn
eg cap
Tfroa
d12cc Clzigs says 1 360 Rus electrod
Overall
Egn 2ft Cly 2Fe 2C
i
Pycsilfetcappf.gg
iron ions insamestate ins 4291gal
d no solidelectrodetherefore Cly is used not a solid
Pt is used
doffhange a
gas I therefore
so Pt as it is a solid
Standardelectrode potentials
Standard electrodepotential the potential differencemeasured when a half all
is connected to thestandard hydrogen electrode
by
represented E understandardconditions
measured volts
in V
To measure this halfcell mustbe connected tostandard hydrogen electrode via
high resistance voltmeter I salt bridge
Conditions hydrogen electrode
of
Pt electrode
inert goodconductor 421A
atlook
E
S
sisterof
e
Imoldm3 Hydrogen
into
Hydrogen gas at 100 kPa pressure 298k
Temperature at 298K
IM Mt
Pt electrode
