IGCSE Chemistry: Electrolysis
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Worksheet
Name:
Date:
Question:
1
2
3
4
Total
Marks:
4
4
4
2
14
Score:
Aims of this worksheet:
• Consolidating electrolysis.
• Practicing exam style questions.
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1. (a) A cation is,
(1 mark)
Negatively charged.
Positively charged.
An electrically charged household pet.
(b) A cathode is,
Negatively charged.
(1 mark)
Positively charged.
(c) An anion is,
Negatively charged.
(1 mark)
Positively charged.
(d) An anode is,
Negatively charged.
(1 mark)
Positively charged.
2. (a) What is an electrolyte?
(1 mark)
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(b) What does ’inert’ mean in the term ’inert electrode’.
(1 mark)
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(c) What does electrolysis mean?
(2 marks)
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3. Copper can be obtained from the electrolysis of molten copper(II) oxide.
(a) Explain why the copper(II) oxide needs to be molten.
(2 marks)
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(b) Write the half equation, including state symbols for,
i. the anode
(1 mark)
...................................................................................
ii. the cathode
(1 mark)
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4. Explain why covalent compounds cannot conduct electricity in molten form but ionic solutions
can.
(2 marks)
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