Electrochemistry 08 _ Class Notes __ Parishram 2025.pdf

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1. —2025—
FOR CLASS 127”

Chemistry

Electro chemi ¡sf
(Lecture - 08

By- Bharti Ma’ am

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TOPICS ..,.....,
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(a) Testigo Rabia;

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Electrochemistry

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Write the Nernst equation and emf of the following cells at 298 K:
(iv) Pt(s) per" (0.010 M) | Br,(l) QH*(0.030 M) | H,(g) (1 bar) | Pt(s).
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7. The standard electrode potential for Deniell cell is 1.1V. Calculate the standard Gibbs
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energy for the reaction: de

Zn(s) + Cu?*(aq) > Zn?*(aq) + Cu(s)

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=? == UX US IE
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= XX UToo at i

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8. Th i wing reaction occurs: = * a

ny
2Fe**(aq) + 2I- (aq) > 2Fe?* (aq) + 1,(s) has EP... = 0.236 V al298K) =
[N À L =

Calculate the standard Gibbs energy and the equilibrium constant of the cell reaction.

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APA

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Electrolytic Cells

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no (Ave =Aviode> ond"
Pho. Cie =Arode soul)

re

Be PE

fee (-w= Coed = Ras

Cathode

Electrolytic
tank

Solution of electrolyte

12. 2a

Decomposition of electrolyte solution by passage of electric current,
decomposition of metals or liberation of gases at electrodes takes place is known
as electrolysis. In this process electrical energy is converted to chemical energy.

A non spontaneous redox reaction takes place in electrolysis with the help of
battery/electrical energy. (AG > 0)

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a

+ve
pene = EAN" > ee
(Oxidaton) Re) ©

Electrolyte

(inert or reactive)
Electrodes

14. Products of electrolysis depend on the nature of material- being electrolysed and

the type of electrodes being used. If the electrode is inert ies Buna or gold), it
does not participate in the chemical reaction . On the other hand, if the electrode is
reactive, it participates in the electrode reaction.

© Nature of Electro lute

O Type of terre? À
SS Reawiive,

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0 Molten) Ag.

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Note:
1) 3 th Electrode 18 Reactivo; a Reaction Stefan anal den Elected
¿how oma" [heat Fearon

&) À not Mentored Consider Electrode do be Trud

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ag ED)

1. Molten Nach > Not + ae" *

C No water) Ze: a
Ce At Cathode, Un (-ve)

FF Are

= Ansdu | Po (Net HONDA

LCL ee +A, it ¿ Ne Tle GND
Mr > te +4, ©

Anal — 2049 1 et

Snot Fer, Mt, Heat

17. un
à) Molten hd, Ales Heat ae’ ae @
3

v
(Ne ware)
Anode tot CaS Cathode Half cell (nie)

CADA aie + 4 ) 2x (Are — 109)

COL ae da Dan

ER + ape — au, + ane

18. E lecesolysis of Ag: Nacl Coon) |
> water Conteut 408

Nack+Ho — Ay. nach
y G

C vonten|)) Come Nach dif Naut (water)

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19. Cheteolwin of Aq: Wace

mode Hare Lh Conia”) ?

QU — ac + QT

4 > À
Nas > na? +u f ®
Ho = Ht + 0H

ad — +a"
ur ant + — HT

CE OH de Cau CRea") ney a+ 2 > HT + gt

T =
BHT + 26 — yh

20. 2 Com of (zo? g Con"
WW inc? = ; e
(BD dec | “4 x Ein. 4
() Sama ah

(C) Lame

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me EP)
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6) & Con" al water UK mnore ( die Electrolyte) un, warn
Wy, a

O SE Ne + eve Aischange- ( Bret nen qu

Mag Nk Musa

22. Gaidation Potential of, Anien

as
Soy

st
Nox u + ee

dow ES Ir

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