Electrochemistry.docx - Electrochemistry study of the relationship between electrical energy and chemical processes Cell reaction vessel Electrolytic

Electrochemistry.docx - Electrochemistry study of the...

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Electrochemistry: study of the relationship between electrical energy and chemical processes Cell- reaction vessel Electrolytic: electrical energy is required for a chemical process to occur; non-spontaneous Galvanic (voltaic): chemical processes produces electricity; spontaneous Electron is on reaction side: cathode Anode typically on product side Electricity: flow of e - Electrodes: surface where redox half-reactions occur (“Red Cat Anox.”) - Cathode: reduction occurs - Anode: oxidation occurs 1. Molten NaCl Cathode: e- + Na+ → Na Anode: 2Cl -→ Cl2 + 2e- 2(e- + Na+ → Na) 2Cl- → Cl2 + 2e- 2e- + 2Na+ +2Cl- → 2Na + Cl2 + 2e- 2NaC → 2Na + Cl2
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2. 3. Aqueous NaCl Cathode: 2e- + 2H2O → 2OH- + H2 Anode: 2Cl -→ Cl2 + 2e- +2Na+ +2Na+ 2e- + 2H2O + 2Cl- → 2OH- + H2 + Cl2 - 2Cl- → Cl2 + 2e-
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