Electrolysis of molten magnesium oxide, MgO

Electrolysis of molten magnesium oxide, MgO

용융 MgO의 전기분해

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▶ Electrodes

> carbon rods (graphite)

▶ Electrolyte

> molten magnesium oxide

▶ Ions present in electrolyte

> magnesium ions (Mg^2+), oxygen ions (O^2-)

▶ Reaction at the cathode (–극)

> Mg^2+(l) + 2e^- → Mg(s)

> 2Mg^2+(l) + 4e^- → 2Mg(s)

▶ Reaction at the anode (+극)

> 2O^2-(l) → O2(g) + 4e^-

▶ Overall reaction

> 2MgO(l) → 2Mg(s) + O2(g)

[그림] 전해전지. 전기분해장치. electrolytic cell.

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