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Inclass Tutorial 6.1-6.2
Transcript of Inclass Tutorial 6.1-6.2
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In-class Tutorial 6.1 and 6.2
Chapter 6 Electrochemistry
4S Xin and 4S Ping 2016
Name: ________________________________ Date: ______________________
Score: / 22 marks
Question 1
Classify the following materials into conductors and non-conductors. [4m]
Material Conductor / Non-conductor
Copper
Plastic
Graphite
Platinum
Question 2
Classify the following chemicals into electrolyte and non-electrolytes. [4m]
Chemicals Electrolyte
Copper(II) chloride
Sucrose
Benzene, C6H6Sodium bromide
Question 3
Diagram below shows the apparatus set-up to study the electrolysis of molten sodium
chloride using graphite electrode. The electrolysis is carried out for 30 minutes.
(a)Define electrolysis. [1m]
(b)State the meaning of electrolyte. [1m]
Graphite electrode
Molten sodium chloride
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(c)What is the meaning of anion? [1m]
(d)State all the ions present in molten sodium chloride. [1m]
(e)Name the ions that will present in
Cathode: .[1m]
Anode: [1m]
(f) Write the half equations for the reaction that occurs at
Cathode: .[1m]
Anode: [1m]
(g)Write the overall equation based for this electrolytic process
[2m]
(h)
Suggest the possible observation that will take place at the anode and cathode.
[2m]
ANODE CATHODE
(i) Based on the diagram above, show the flow of electron. [1m]
Question 4
Draw a labelled diagram to show the electrolytic process which involved the usage of
graphite electrodes and molten potassium bromide as the electrolyte. Based on the
diagram, show the flow of electron. [3m]