Year 11 Chemical Changes - Homework 2
Score:___/19
Name:________
1) Define the following terms:
Oxidation: _____________________________________________________________
Reduction: _____________________________________________________________
Anion:_________________________________________________________________
Cation:_________________________________________________________________
Anode: ________________________________________________________________
(4)
2) Explain why solid MgCl2 cannot be electrolysed.
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(2)
3) Complete the following half equations:
i) Na+ + ___ → Na
iii) Mg2+ + ___ → ___
ii) ___F- → F2 + ___
iv) ___Cl- → ___ + ___
(4)
4) Explain why potassium cannot be extracted from its ore by smelting?
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(2)
5) Write a word equation for the reaction of copper oxide and carbon to form copper metal
and carbon dioxide.
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(1)
6) Write a symbol equation for the reaction of hydrochloric acid with sodium hydroxide to
form sodium chloride and one other product
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(2)
7) Describe the product formed at each electrode when an aqueous solution of KCl is
electrolysed. Give a half equation for the reaction at each electrode.
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(4)