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Chemistry A Level ELECTROCHEMISTRY
Chemistry A Level ELECTROCHEMISTRY
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Electrochemistry· 1111-Jer
If Electrodes non-inert ,
anode thins cathode fattens
,
anode ↓ then
-> cathode
Electrolyte must contain its ion
*
- cations
-
+
anions)
· 1111-Jer
Anode oxidation
2n -> In
cathode reduction
-X-tet
!
-
-2n + 2e -
- zn
2n 2nz+ 2e
-
+ +
-
time
strength of current (1) Q It
-
:
·
Faraday 1 F = 96500C
quantity of electric charge carried by mole of electrons
-
one
+
2nz + 2e -
-
Na + e + 2n
-
-> Na
1F - 1 mol of Na 27 - 7 mol of In
96500c -
239 193000 - 65 .
49
if CUSO4 , Cu2t selected
Affect cation
->
I . 207 2 1800C .
.Cone
2 HzSOp(aq) Electrolysed , volume of O2 produced ? At r t
. .
P
pp2+ 900C 2H+ + ze - -
+ 2- - Pb He cathode
SO4
-
2x96500c -
2079 X OR OH-
↓
Selected
1800c + 1 .
939
4) OH Oz
-
-> + 2H20 +42 Anode
3860002 + 24dm3
900c -> 0 .
056bm3
,
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