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Summary Electrochemistry
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Handwritten cheat sheet for Electrochemistry by JEE 2020, GATE, CSIR topper
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atharvashinde
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ElecaochemustryElecpchemical cell /Galvanic cell converts.
chemical to elecical enesg with the help
of spontaneous xedax k
Elecholytic cell conxext elecical enesqy to
chemca enexgt witth the help of a
sponetaneougedox xn cuhich
which is
is foscibly made
to occus
hyy paasing electicity
Galvanic cell cell consists of 22 seperohe
Giteg of oxidation and reduchon called half
cells. consisting of same element in 2 dif
Oxidaton statThese cells ane. ontearally
conecied by a cuise thaough ohich the e Aow
The diechon o Flow of &- is é from oxidaton
cell to eduetion cell The direchon of curent
is opp. to diaechion of Alow ofe
* The wo half cells ae also connected bu
Salt Bridge Cthha containung elacbraytea
Fom). No' current Flous oitheut the salt
in
bandge
Ex. Daniel cel made oF Ca xod dipped in Caso
and zn x0d dipped in ZnSOa
Zn cel undegoeS oX0dahon
The half cell dt whch oxidaton
iG called anode and has -e.
tates place
polaxity
, :AB anode i- Z n s ) z n +e.
An electical double, ayer is deelopec ancl
a potenhal diE is ceated called the
elecbodepoenhal aohich is eaua staegof
to he
potential diff be tao Ox0dahon
ie Zn (s)Zn2
: Reachon at Anode Cu 2t + 2e u
Funchion oF salt bndge
D compleles the cixit
) minimi zeg he igjunchonpotenhal
s) t maintaing elechical nedalityj
4) The ions oF salt baicge do'not react
5) The tLbe is filled wrth agar-0ga
prevening mechanical mixihg_ of.
6) The
sold
jons" oe seleeted such that the speed ot
cahon & anon shauld be same, Foz
be similax chaxge and sze of ion speeds_ Jo
legua e kclkNDa, NH4hNO,ete should be
DF Ag', Hg P, T axe prasent in a
Ku Sheul
ku sheold hot be uged ag cell hen
thehs can be
peipitahon of Agld, Hgscla, PhCJ ex Ticd
Electode Potential
Potenhial dif betn 2oxidahon stateg
4 deperds on
)States of element loxidahon)
Conenaahon
a)Nahxe lphal prezuKe
oF element
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