What you’ll learn11 learning objectivesChoose one objective for a focused lesson, or study the complete topic.4.1.1Electrolysis as the decomposition of• Define electrolysis as the decomposition of an ionic compound, when molten or in aqueous solution, by the passage of an electric currentSyllabus objective4.1.2In simple electrolytic cells: (a) the• Identify in simple electrolytic cells: (a) the anode as the positive electrode (b) the cathode as the negative electrode (c) the electrolyte as the molten or aqueous substance that undergoes electrolysisSyllabus objective4.1.8Transfer of charge during electrolysis• Describe transfer of charge during electrolysis to include: (a) the movement of electrons in the external circuit (b) the loss or gain of electrons at the electrodes (c) the movement of ions in the electrolyteSyllabus objective4.1.3Products and observations during• Identify products and observations during electrolysis of: (a) molten lead(II) bromide (b) concentrated aqueous sodium chloride (c) dilute sulfuric acid with inert platinum/carbon electrodesSyllabus objective4.1.4Metals or hydrogen are formed at the• State: metals or hydrogen are formed at the cathode and that non-metals (other than hydrogen) are formed at the anodeSyllabus objective4.1.5Predict the identity of the products• Predict the identity of the products at each electrode for the electrolysis of a binary compound in the molten stateSyllabus objective4.1.6Metal objects are electroplated to• State: metal objects are electroplated to improve their appearance and resistance to corrosionSyllabus objective4.1.7Metals are electroplated• Describe how metals are electroplatedSyllabus objective4.1.9Products formed at the electrodes and• Identify the products formed at the electrodes and describe the observations made during the electrolysis of aqueous copper(II) sulfate using inert carbon/graphite electrodes and when using copper electrodesSyllabus objective4.1.10Predict the identity of the products• Predict the identity of the products at each electrode for the electrolysis of a halide compound in dilute or concentrated aqueous solutionSyllabus objective4.1.11Construct ionic half-equations for• Construct ionic half-equations for reactions at the anode (to show oxidation) and at the cathode (to show reduction)Syllabus objective