ELECTROLYSIS: Decomposition of an ionic substance by passing an electric current through it
s
ELECTROLYSIS OF LEAD (II) BROMIDE:
s
ELECTROLYSIS OF LEAD (II) BROMIDE
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Diagram showing the Electrolysis of Lead (II) Bromide
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METHOD:
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REACTION AT ELECTRODES:
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SOLUTION
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PRODUCT AT POSITIVE ELECTRODE
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PRODUCT AT NEGATIVE ELECTRODE
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LEAD (II) BROMIDE ( PbBr2 )
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Bromine - Br2
2Br - - 2e- → Br2
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Lead - Pb
Pb2+ + 2e- → Pb
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s
ELECTROLYSIS OF AQUEOUS SOLUTIONS:
ss
RULES:
s- Aqueous Solutions will Always have Water ( H2O )
Positive Electrode
s- Either Oxygen or Non-Metal will be produced E.g Chlorine, Bromine, Nitrogen
s
Negative Electrode
s- Either Hydrogen or Metal will be produced
- If Metal is above Hydrogen in Reactivity Series, Hydrogen will be produced
- If Metal is below Hydrogen in Reactivity Series, Metal will be produced
ELECTROLYSIS OF AQUEOUS SOLUTIONS
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Diagram showing the Electrolysis of Aqueous Solutions
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METHOD:
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REACTION AT ELECTRODES:
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AQUEOUS SOLUTION
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PRODUCT AT POSITIVE ELECTRODE
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PRODUCT AT NEGATIVE ELECTRODE
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SODIUM CHLORIDE ( NaCl )
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Chlorine - Cl
2Cl- - 2e- → Cl2
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Hydrogen - H2
2H2O + 2e- → H2 + 2OH-
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DILUTE SULFURIC ACID ( H2SO4 )
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Oxygen - O2
2H2O - 4e- → O2 + 4H+
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Hydrogen - H2
2H+ + 2e- → H2
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COPPER (II) SULFATE ( CuSO4 )
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Oxygen - O2
2H2O - 4e- → O2 + 4H+
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Copper - Cu
Cu2+ + 2e- → Cu
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ReplyDeleteIndustrial Parts Washer
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ReplyDeleteNEGATIVE ELECTRODE for Lead (II) Bromide hydrogen and not lead ???
ReplyDeleteor is there no water for that reaction?
No water. The syllabus statements says it's molten.
Delete