Neco Model Questions Vol1 2018 Chemistry Question 49
Practice objective / multiple choice question 49 from the 2018 Neco Model Questions Vol1 Chemistry examination.
In the Hall-Héroult process aluminium is produced by electrolytic reduction of alumina. A cell operates at a constant voltage of 4.5 V and a current of 5000 A for 24 h. Assuming 100 % current efficiency and that the cathodic reaction is Al^{3+}+3e^{-}\rightarrow Al(s), determine (a) the mass of aluminium produced, (b) the electrical energy consumed in kilowatt‑hours, and (c) the cost of electricity if the rate is ₦30 per kWh. Use F = 96485 C mol^{-1} and M_{Al}=27.0 g mol^{-1}.
Answer Options
About This Question
This is Neco Model Questions Vol1 2018 Chemistry Question 49. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.