6.2 (b) molten compound2
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Transcript of 6.2 (b) molten compound2
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KPD4033 TEKNOLOGI DAN INOVASI
DALAM PENDIDIKAN
Ahli Kumpulan:
Noor Emy Liana Daud L20112007112
Nor Azieda Azahari L20112007081Mahfuza Mansor
L20112007049Zeti Farhana Mohd Lazim L20112007113
Amimah Mohammad Ayub
L20112007076
Pensyarah : Dr. Ramlah Mailok
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ELECTROCHEMISTRY
ELECTROLYSIS IN MOLTEN STATE
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CONTENTS
Objective
Induction Set
Introduction
Molten State
Exercises
Conclusion
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AFTER THE LESSON STUDENTS ARE ABLE TO…..
Identify the ions present in molten compound.
Name the cations and anions of a molten compound.
Determine the product formed in cathode and anode.
Introduction
Molten State
Exercises
Conclusion
Objective
Induction Set
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Introduction
Molten State
Objective
Induction Set
Exercises
Conclusion
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Do you remember?
Why solid sodium chloride does not conduct electricity?
Why molten sodium chloride is an electrolyte?
When electrolysis of a molten compound, where should anion and cation move?
Introduction
Molten State
Objective
Induction Set
Exercises
Conclusion
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ELECTROLYSIS OF A MOLTEN COMPOUND
Introduction
Molten State
Objective
Induction Set
Exercises
Conclusion
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1. Identify all ion present in molten state
2. Identify ion moving to cathode and anode electrode
3. Identify the ion that will be discharge in cathode and anode
Steps to identify ion in electrolysis of MOLTEN
STATE
4. Write half equation in cathode and anode
Introduction
Molten State
Objective
Induction Set
Exercises
Conclusion
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COMPREHENSION
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Complete the following passage to describe the electrolysis of lead bromide. Use the words from the box to complete the passage.
When lead bromide is it contains free of lead and bromine. Lead is a so it forms ions. Bromine is a so it forms ions. The ions are attracted to the negative where they gain to form metal. The ions are attracted to the positive where they lose to form gas.
Ions non-metal lead Electrode electrons bromine molten metal positive negative bromide
moltenions
metal positivenon - metal negativ
eleadelectrod
eelectrons leadbromide
electrodeelectrons
bromine
Introduction
Molten State
Objective
Induction Set
Exercises
Conclusion
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Electrolytes can conduct electricity because there have free moving…
Ready for Quiz???
A) Electrons
D) Ions
B) Molecules
C) Atoms
Introduction
Molten State
Objective
Induction Set
Exercises
Conclusion
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What are the ions present in aqueous solution of silver nitrate?
Ready for Quiz???
A) Silver ions and nitrate ions
D) Hydroxide ions and hydrogen ions
B) Silver ions, nitrate ions and hydroxide ions
C) Silver ions, nitrate ions, hydroxide ions and hydrogen
ions
Introduction
Molten State
Objective
Induction Set
Exercises
Conclusion
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Ready for Quiz???What is the final product produced at anode?
A) Sodium
D) Chlorine gas
B) Chloride ion
C) Sodium Chloride
Introduction
Molten State
Exercises
Objective
Induction Set
Conclusion
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Which of the following ions attracted to anode during electrolysis of aqueous Zinc chloride solution?
Ready for Quiz???
A) Zinc ion only.
D) Chloride ion and hydroxide
ion.
B) Zinc ion and chloride ion.
C) Zinc ion and hydrogen ion.
Introduction
Molten State
Exercises
Objective
Induction Set
Conclusion
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CONCLUSIONS Ions present in the compound of
NaCl in molten state are Na+ and Cl-
Cations : Na+
Anions : Cl- Product at cathode : Sodium Product at anode : Chlorine gas
Introduction
Molten State
Exercises
Objective
Induction Set
Conclusion
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1. Molten NaCl• Na+
• Cl-
2. Molten PbI2• Pb2+
• I-
Electrolysis of a molten compound ONLY occur 2 ions in the electrolyte
1. Identify all ion present in molten state
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1. Molten NaCl
• Na+
• Cl-
cathode
anode
2. Molten PbI2• Pb2+
• I-cathodeanode
2. Identify ion moving to cathode and anode electrode
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1. Molten NaCl
• Na• Cl2(g)
cathode
anode
2. Molten PbI2• Pb• I2(g)
cathodeanode
3. Identify the ion that will be discharge in cathode and anode
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1. Molten NaCl• Na+
Cathode:
• Na+ + 2e Na
• Cl-
Anode:
• 2Cl- Cl2 + 2e
2. Molten PbI2• Pb2+
Cathode:
• Pb2+ + 2e Pb
• I-
Anode:
• 2I- I2 + 2e
4. Write half equation in cathode and anode