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Electrochemistry Electrolysis of Aqueous Salts • What products are formed at a) the anode and b) the cathode when concentrated aqueous copper(II) chloride is electrolysed using a) At the anode (+ve): Negatively charged chloride ions and hydroxide ions (anions) are both attracted to the positive anode. At high concentration, chloride ions are preferentially oxidised to molecular chlorine at the anode: 2Cl−(aq) → Cl2(g) + 2e− inert electrodes? b) At the cathode (–ve): Positively charged copper(II) ions and hydrogen ions (cations) are both attracted to the negative cathode. Copper is below hydrogen in the electrochemical series, therefore copper(II) ions are preferentially reduced to copper atoms at the cathode: Cu2+(aq) + 2e− → Cu(s)PDF Image | Electrolysis of Aqueous Salts
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