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Edexcel GCSE Combined Science · 1SC0
Electrolytic processes
Recall that electrolytes are ionic compounds present in a molten state or dissolved in water.
Describe electrolysis as a process that utilizes electrical energy from a direct current supply to decompose electrolytes.
Explain the movement of ions during electrolysis, specifically how cations migrate to the cathode and anions migrate to the anode.
Explain the formation of products during the electrolysis of various electrolytes using inert electrodes, including copper chloride, sodium chloride, sodium sulfate, acidified water, and molten lead bromide.
Predict the specific products generated from the electrolysis of various binary ionic compounds in the molten state.
Formulate half equations for the chemical reactions occurring at both the anode and cathode during electrolysis.
Explain the concepts of oxidation and reduction strictly in terms of the loss or gain of electrons.
Recall that during electrolysis, reduction takes place at the cathode while oxidation takes place at the anode.
Explain how products are formed during the electrolysis of copper sulfate solution using copper electrodes, and describe how this process is applied to purify copper.
Investigate the electrolysis of copper sulfate solution using both inert and copper electrodes.