Question

The voltage in the Hall-Heroult process is around __________

(a) 2-9 V

(b) 15.5-16.5 V

(c) 26-45 V

(d) 6-8 V

I have been asked this question in my homework.

I would like to ask this question from Chemical Processes of Aluminium topic in chapter Wrought Aluminium Alloys of Aerospace Materials & Processes

Answer 1

Right answer is (d) 6-8 V

The best explanation: The Hall-Heroult process is widely used. It involves the mixing of molten cryolite with alumina to perform electrolysis. The mixing of these results in a lower melting point of the molten bath. The voltage in this process is typically 6-8 V.