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Transcript of Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use...
![Page 1: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/1.jpg)
Electrolysis
Electrolysis describes what happens in an electrolytic cell andmeans to use electricity to make chemicals.
Pb Al Zn Na K Li H2 Cl2 F2
I2 O2 are all made by electrolysis
When metals are made by electrolysis it is sometimes called electrowinning as the metal is won from the ion as it is reduced.
Pb2+ + 2e- → Pb(s)
2Cl- → Cl2(g) + 2e-
![Page 2: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/2.jpg)
Electrolysis of Aluminum Alcan Kitimat B.C.
Name of the Ore used: Bauxite Al2O3
.3H2O
Heating drives off the water
Al2O3.3H2O + Heat → Al2O3 + 3H2O
Melting point of Bauxite is 2045 0C
This is too hot!Cryolite is added Lowers the melting point to 1000 0C
![Page 3: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/3.jpg)
DC Power - +
Al2O3(l)
CC
![Page 4: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/4.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
![Page 5: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/5.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
reduction
![Page 6: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/6.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
Reduction
+
Oxidation
![Page 7: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/7.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
Reduction
Cathode
+
Oxidation
Anode
![Page 8: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/8.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
Reduction
Cathode
+
Oxidation
Anode
![Page 9: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/9.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
Reduction
Cathode
Al3+ + 3e- → Al(s)
+
Oxidation
Anode
![Page 10: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/10.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
Reduction
Cathode
Al3+ + 3e- → Al(s)
+
Oxidation
Anode
2O2- → O2 + 4e-
![Page 11: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/11.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
Reduction
Cathode
Al3+ + 3e- → Al(s)
+
Oxidation
Anode
2O2- → O2 + 4e-
Liquid Al floats to the top and is removed.
![Page 12: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/12.jpg)
DC Power - +
Al2O3(l)
CC
Al3+
O2-
-
Reduction
Cathode
Al3+ + 3e- → Al(s)
+
Oxidation
Anode
2O2- → O2 + 4e-
Liquid Al floats to the top and is removed.
Oxygen gas
![Page 13: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/13.jpg)
Non-Inert ElectrodesYou must understand that a non-inert Anode might oxidize.
K2SO4(aq)
DC Power
- +
CuCu
![Page 14: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/14.jpg)
Non-Inert ElectrodesYou must understand that a non-inert Anode might oxidize.The Cathode will stay inert because it already is reduced.
K2SO4(aq)
DC Power
- +
CuCu
![Page 15: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/15.jpg)
Non-Inert ElectrodesYou must understand that a non-inert Anode might oxidize.The Cathode will stay inert because it already is reduced.
DC Power
- +
K2SO4(aq)
CuCu
2K+
SO42-
H2O
![Page 16: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/16.jpg)
Non-Inert ElectrodesYou must understand that a non-inert Anode might oxidize.The Cathode will stay inert because it already is reduced.
DC Power
- +
K2SO4(aq)
CuCu
2K+
SO42-
H2O
-
Cathode
Reduction
![Page 17: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/17.jpg)
Non-Inert ElectrodesYou must understand that a non-inert Anode might oxidize.The Cathode will stay inert because it already is reduced.
DC Power
- +
K2SO4(aq)
CuCu
-
Cathode
Reduction
2H2O + 2e-→H2 +2OH-
-0.41 v
2K+
SO42-
H2O
![Page 18: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/18.jpg)
Non-Inert ElectrodesYou must understand that a non-inert Anode might oxidize.The Cathode will stay inert because it already is reduced.
DC Power
- +
K2SO4(aq)
CuCu
-
Cathode
Reduction
2H2O + 2e-→H2 +2OH-
-0.41 v
+
Anode
Oxidation
2K+
SO42-
H2O
![Page 19: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/19.jpg)
You must look at the possible oxidation of:
H2O SO4
2- CuCheck out the reduction chart!
S2O82- + 2e- → 2SO4
2- 2.01 v
1/2O2 + 2H+(10-7M) → H20 0.82 v
Cu+ + 1e- → Cu(s) 0.52 v
Cu2+ + 2e- → Cu(s)* 0.34 v* Strongest Reducing Agent
![Page 20: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/20.jpg)
Non-Inert Electrodes
You must understand that a non-inert Anode might oxidize.The Cathode will stay inert because it already is reduced.
DC Power
- +
K2SO4(aq)
CuCu
2K+
SO42-
-
Cathode
Reduction
2H2O + 2e-→H2 +2OH-
-0.41 v
+
Anode
Oxidation
Cu(s) → Cu2++2e-
-0.34 v
![Page 21: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/21.jpg)
Non-Inert Electrodes
You must understand that a non-inert Anode might oxidize.The Cathode will stay inert because it already is reduced.
DC Power
- +
K2SO4(aq)
CuCu
2K+
SO42-
-
Cathode
Reduction
2H2O +2e→H2(g)+2OH-
-0.41 v
+
Anode
Oxidation
Cu(s) → Cu2++2e-
-0.34 v
2H2O + Cu(s) → Cu2++ H2 +2OH- E0 = -0.75 v MTV = +0.75 v
![Page 22: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/22.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
![Page 23: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/23.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
Pourous membrane
Or it might look like this
![Page 24: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/24.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
![Page 25: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/25.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
Is this cell electrolytic or electrochemical?
![Page 26: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/26.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
Electrochemical- There is no power supplyCu is higher and the cathodeZn is lower and the anode.
![Page 27: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/27.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
Electrochemical- Cu is higher and the cathodeZn is lower and the anode.
CathodeReductionNo Cu2+ to reduce!
![Page 28: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/28.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
Electrochemical- Cu is higher and the cathodeZn is lower and the anode.
CathodeReduction2H+ + 2e- → H2(g)
0.00 v
![Page 29: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/29.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
Electrochemical- Cu is higher and the cathodeZn is lower and the anode.
CathodeReduction2H+ + 2e- → H2(g)
0.00 v
AnodeOxidationWhat oxidizes?ZnH2OCl-
![Page 30: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/30.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
Electrochemical- Cu is higher and the cathodeZn is lower and the anode.
CathodeReduction2H+ + 2e- → H2(g)
0.00 v
AnodeOxidationZn → Zn2+ + 2e-
0.76 v
![Page 31: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/31.jpg)
HCl(aq)
ZnCu
0.76 v Voltmeter
Analyze This Cell
H+
H2O
Cl-
2H+ + Zn(s) → Zn2+ + H2(g) E0 = 0.76 v
CathodeReduction2H+ + 2e- → H2(g)
0.00 v
AnodeOxidationZn(s) → Zn2+ + 2e-
0.76 v
![Page 32: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/32.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Cathode: Electrolyte:
DC Power
![Page 33: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/33.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Ni Cathode: Electrolyte:
DC Power
Ni
![Page 34: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/34.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Ni Cathode: Cu Electrolyte:
DC Power
Cu
Ni
![Page 35: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/35.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Ni Cathode: Cu Electrolyte: Ni(NO3)2
DC Power
Cu
Ni
Ni2+
NO3-
![Page 36: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/36.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Ni Cathode: Cu Electrolyte: Ni(NO3)2
DC Power- +
Cu
Ni
Ni2+
NO3-
![Page 37: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/37.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Ni Cathode: Cu Electrolyte: Ni(NO3)2
DC Power- +
Cu
Ni
Ni2+
NO3-
-ReductionCathode
![Page 38: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/38.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Must be negative!Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Ni Cathode: Cu Electrolyte: Ni(NO3)2
DC Power- +
Cu
Ni
Ni2+
NO3-
-ReductionCathodeNi2+ + 2e- → Ni(s)
![Page 39: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/39.jpg)
Electroplating
Electroplating is the process of reducing a metal on to the surface of another. Anode: Metal to be plated on top the other metal Cathode: The other metal to be covered with the new metal Electrolyte: Must contain the ion of the metal that plates Ni plating a Cu penny Anode: Ni Cathode: Cu Electrolyte: Ni(NO3)2
DC Power- +
Cu
Ni
Ni2+
NO3-
-ReductionCathodeNi2+ + 2e- → Ni(s)
+OxidationAnodeNi(s) → Ni2+ + 2e-
e-
![Page 40: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/40.jpg)
Silver plating a Loonie Anode: Cathode:
Electrolyte:
DC Power
$1
![Page 41: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/41.jpg)
Silver plating a Loonie Anode: Ag Cathode:
Electrolyte:
DC Power
$1
Ag
![Page 42: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/42.jpg)
Silver plating a Loonie Anode: Ag Cathode: Loonie
Electrolyte:
DC Power- +
$1
Ag
Loonie
![Page 43: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/43.jpg)
Silver plating a Loonie Anode: Ag Cathode: Loonie
Electrolyte: AgNO3
DC Power- +
$1
Ag
Loonie
Ag+
NO3-
![Page 44: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/44.jpg)
Silver plating a Loonie Anode: Ag Cathode: Loonie
Electrolyte: AgNO3
DC Power- +
$1
Ag
Loonie
Ag+
NO3-
-ReductionCathodeAg+ + 1e- → Ag(s)
+OxidationAnodeAg(s) → Ag+ + 1e-
e- e-
![Page 45: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/45.jpg)
Electrorefining Electrorefining is the process of purifying a metal by electrolysis.Impure metal is oxidized at the anode and pure metal is reduced at the cathode.This is the same as electroplating. The Electrorefinning of Lead Cominco Trail, B.C.
Cathode: Anode:
Electrolyte:
DC Power- +
![Page 46: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/46.jpg)
Electrorefining Electrorefining is the process of purifying a metal by electrolysis.Impure metal is oxidized at the anode and pure metal is reduced at the cathode.This is the same as electroplating. The Electrorefinning of Lead Cominco Trail, B.C.
Cathode: Pure Pb Anode:
Electrolyte:
DC Power- +
![Page 47: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/47.jpg)
Electrorefining Electrorefining is the process of purifying a metal by electrolysis.Impure metal is oxidized at the anode and pure metal is reduced at the cathode.This is the same as electroplating. The Electrorefinning of Lead Cominco Trail, B.C.
Cathode: Pure Pb Anode: Impure Pb
Electrolyte:
DC Power- +
![Page 48: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/48.jpg)
Electrorefining Electrorefining is the process of purifying a metal by electrolysis.Impure metal is oxidized at the anode and pure metal is reduced at the cathode.This is the same as electroplating. The Electrorefinning of Lead Cominco Trail, B.C.
Cathode: Pure Pb Anode: Impure Pb
Electrolyte: Pb(NO3)2
DC Power- +
Pb2+
NO3-
![Page 49: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/49.jpg)
Electrorefining Electrorefining is the process of purifying a metal by electrolysis.Impure metal is oxidized at the anode and pure metal is reduced at the cathode.This is the same as electroplating. The Electrorefinning of Lead Cominco Trail, B.C.
Cathode: Pure Pb Anode: Impure Pb
Electrolyte: Pb(NO3)2
DC Power- +
Pb2+
NO3-
-ReductionCathode
Pb2+ + 2e- → Pb(s)
![Page 50: Electrolysis Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals. Pb Al Zn Na K Li H 2 Cl 2 F 2.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649f325503460f94c4ef66/html5/thumbnails/50.jpg)
Electrorefining Electrorefining is the process of purifying a metal by electrolysis.Impure metal is oxidized at the anode and pure metal is reduced at the cathode.This is the same as electroplating. The Electrorefinning of Lead Cominco Trail, B.C.
Cathode: Pure Pb Anode: Impure Pb
Electrolyte: Pb(NO3)2
DC Power- +
Zn2+
Pb2+
NO3-
-ReductionCathode
Pb2+ + 2e- → Pb(s)
+OxidationAnode
Pb(s) → Pb2+ + 2e- Au Cu