Electrolysis
7 past-paper questions on Electrolysis · examined 2018–2023.
20234 questions
Which statement describes what happens during electrolysis? (1) A atoms are decomposed B ionic compounds are decomposed C mixtures are separated D molecules are separated
Use the words from the box to complete the labelling of the diagram in Figure 5. anode cathode electrolyte
The products of the electrolysis shown in Figure 5 are solid X and gas Y. Draw one straight line from each product to its name.
The experiment is repeated using powdered solid copper chloride instead of copper chloride solution. Nothing happens and no products are formed. Explain why nothing happens and no products are formed.
20183 questions
Solid sodium chloride is dissolved in water. The sodium chloride solution is electrolysed in the apparatus shown in Figure 8. State why sodium chloride solution, rather than solid sodium chloride, must be used in this experiment.
The formulae of the ions present in the sodium chloride solution are Na + Cl – H + OH – Circle the ions that would be attracted to the anode.
Molten lead bromide can be electrolysed to form molten lead and bromine gas. Explain how a student could modify the apparatus shown in Figure 8 to carry out this electrolysis.
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