Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
The electrolysis of some other solutions using inert electrodes
19 practice questions
Practice questions
1–10 of 19
Question 1
1 mark · Easy
Answer and see the solution →State the ion that will produce oxygen gas at the anode, instead of a halogen, during the electrolysis of an aqueous solution.
Question 2
3 marks · Easy
Answer and see the solution →(a)[1 mark]A student electrolyses aqueous sodium nitrate using inert electrodes. State the product formed at the cathode.
(b)[1 mark]State the product formed at the anode.
(c)[1 mark]Write a half-equation for the reaction at the cathode.
Question 3
2 marks · Easy
Answer and see the solution →Calcium chloride solution is electrolysed using inert electrodes. Use the reactivity series to determine whether calcium or hydrogen is formed at the cathode. State your answer and give a reason.
Question 4
2 marks · Easy
Answer and see the solution →Explain why nitrate ions do not produce a gas at the anode during the electrolysis of aqueous sodium nitrate solution with inert electrodes.
Question 5
3 marks · Easy
Answer and see the solution →Ions present in three aqueous solutions Solution Cation(s) Anion(s) A K^+ Cl^- B Mg^{2+} SO_4^{2-} C Cu^{2+} NO_3^- (a)[1 mark]For solution B, state the product at the cathode when electrolysed using inert electrodes.
(b)[1 mark]For solution C, state the product at the anode when electrolysed using inert electrodes.
(c)[1 mark]For solution A, explain why this gas forms at the cathode instead of the metal.
Question 6
1 mark · Easy
Answer and see the solution →State whether aluminium or hydrogen is produced at the cathode during the electrolysis of aqueous aluminium sulfate using inert electrodes.
Question 7
3 marks · Easy
Answer and see the solution →(a)[1 mark]Name the ion that will produce oxygen gas at the anode during the electrolysis of aqueous potassium sulfate solution with inert electrodes.
(b)[1 mark]Write the ionic equation for the formation of oxygen at the anode.
(c)[1 mark]State another negative ion commonly found in salts that will also result in the formation of oxygen at the anode.
Question 8
2 marks · Easy
Answer and see the solution →A student electrolyses an aqueous solution of potassium nitrate using inert electrodes.
State the name of the product formed at:
(a)[1 mark]the cathode
(b)[1 mark]the anode
Question 9
2 marks · Normal
Answer and see the solution →State the products formed at the cathode and at the anode when dilute sodium sulfate solution is electrolysed using inert electrodes.
Question 10
4 marks · Normal
Answer and see the solution →Potassium chloride solution is electrolysed using inert electrodes.
(a)[1 mark]State whether hydrogen or potassium is formed at the cathode.
(b)[2 marks]Explain why this product is formed at the cathode, using the reactivity series.
(c)[1 mark]Name the product formed at the anode.