is produced at the anode. 4.7.5.3 The ions discharged Predict the products 2 Define the term aqueous. Electrolyse aqueous RSC practical when an aqueous of the electrolysis of copper (II) sulfate method Extended writing: describe solution is electrolysed aqueous solutions following the RSC how an aqueous solution using inert electrodes containing a single method. is electrolysed. depend on the relative compound. Write balanced half Explain why the following reactivity of the equations for the atoms could be produced: elements involved. reactions that occur at hydrogen At the negative both electrodes. oxygen. electrode (cathode), Write a full description hydrogen is produced if WS 1.2 of this method. the metal is more (HT only) Write half Required practical 21: reactive than hydrogen. equations for the reactions investigate what At the positive occurring at the electrodes happens when electrode oxygen during electrolysis. aqueous solutions are is produced unless the Students may be required electrolysed using inert solution contains halide to complete and balance electrodes. This should ions when the halogen supplied half equations. be an investigation is produced. involving developing a This happens because hypothesis. in the aqueous solution
is produced at the anode. 4.7.5.3 The ions discharged when an aqueous solution is electrolysed using inert electrodes depend on the relative reactivity of the elements involved. At the negative electrode (cathode), hydrogen is produced if the metal is more reactive than hydrogen. At the positive electrode oxygen is produced unless the solution contains halide ions when the halogen is produced. This happens because in the aqueous solution Predict the products of the electrolysis of aqueous solutions containing a single compound. 2 Define the term aqueous. Extended writing: describe how an aqueous solution is electrolysed. Explain why the following atoms could be produced: hydrogen oxygen. WS 1.2 (HT only) Write half equations for the reactions occurring at the electrodes during electrolysis. Students may be required to complete and balance supplied half equations. Electrolyse aqueous copper (II) sulfate following the RSC method. Write balanced half equations for the reactions that occur at both electrodes. Write a full description of this method. Required practical 21: investigate what happens when aqueous solutions are electrolysed using inert electrodes. This should be an investigation involving developing a hypothesis. RSC practical method
AQA-8465-SOW-MAI.DOCX