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Electrochemistry Electrolysis of Acids and Alkalis • What products are formed at a) the anode and b) the cathode when concentrated hydrochloric acid is electrolysed using inert 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− electrodes? b) At the cathode (–ve): Hydrogen ions are the only cations present in the solution. Positively charged hydrogen ions are attracted towards the negatively charged cathode where they are reduced to molecular hydrogen: 2H+(aq) + 2e− → H2(g)PDF Image | Electrolysis of Aqueous Salts
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