Which requires the most electricity (in terms of faradays of charge transferred)per gram of useful product formed? A)electrolysis of aqueous NaCl (chlor-alkali industry) B)electrolysis of molten NaCl/CaCl₂ in a Downs cell C)electrorefining copper metal D)production of aluminum in the Hall-Heroult process

Question

Quizplus · Accepted Answer

The production of aluminum in the Hall-Heroult process requires the most electricity per gram of useful product formed. This is because the electrolysis of aluminum oxide to produce aluminum metal involves the transfer of a large amount of charge (three moles of electrons per mole of aluminum produced) and aluminum has a relatively high molar mass, making the process energy-intensive compared to the other options listed.

Which Requires the Most Electricity (In Terms of Faradays of Charge