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ELECTRO CHEMISTRY MOHD.ILIAS
MOHD.ILIAS@5572131 12-D/2015
Write the Applications of Kohlrausch law
To calculate m for a weak and strong electrolyte from the o of
individual ions. a) For strong electrolytes like NaCl, NaCl = Na+ +
Cl b) For weak electrolytes it can be be obtained by the knowledge
of limiting molar conductivity of some strong
electrolytes CH3COOH = CH3COONa + HCl - NaCl
NH4OH = NH4Cl + NaOH - NaCl
H2O = HCl + NaOH - NaCl
To calculate the degree of dissociation of weak electrolyte
:
To determine the value of the dissociation constant for weak
electrolyte (ka)
Numerical :
1.
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ELECTRO CHEMISTRY MOHD.ILIAS
MOHD.ILIAS@5572131 12-D/2015
Batteries :
What is primary batteries ?
What are secondary cells?
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ELECTRO CHEMISTRY MOHD.ILIAS
MOHD.ILIAS@5572131 12-D/2015
Ex: Lead storage batteries and nickel cadmium batteries :
Explain dry cell (leclanchcell)
Anode Zinc container
Cathode Carbon rod surrounded by carbon and MnO2
electrolyte Moist paste of NH4Cl and ZnCl2
Cell reactions
anode
cathode
Why dry cell cant be recharged and have definite life?
Explain Mercury cell/ cell used in hearing aids :
Why mercury cell gives constant voltage?
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ELECTRO CHEMISTRY MOHD.ILIAS
MOHD.ILIAS@5572131 12-D/2015
Explain lead storage battery
Anode
Cathode
electrolyte
anode
cathode
overall
Write the cell reactions of lead storage cell when
recharging?
Write the overall reaction of Nickel Cadmium storage cell and
explain advantage and disadvantage of it?
What is fuel cell ?
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ELECTRO CHEMISTRY MOHD.ILIAS
MOHD.ILIAS@5572131 12-D/2015
Explain hydrogen fuel cell ?
What are the advantages of fuel cell?
What is corrosion?
Explain why Rusting of iron is electrochemical phenomenon ?
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ELECTRO CHEMISTRY MOHD.ILIAS
MOHD.ILIAS@5572131 12-D/2015
Write the prevention methods of rusting ?
Explain
1.
Rusting inhibits in alkaline medium
2.
Rusting becomes faster in saline water
3.
4.
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ELECTRO CHEMISTRY MOHD.ILIAS
MOHD.ILIAS@5572131 12-D/2015
