# What is the electricity that needs to be expended to obtain 500 kg of pure copper if the voltage

What is the electricity that needs to be expended to obtain 500 kg of pure copper if the voltage across the electrolytic cell is 0.4 V.

Data: m (mass of pure copper to be obtained in an electrolytic bath) = 500 kg; U (voltage across the electrolytic bath) = 0.4 V.

Reference values: k (electrochemical equivalent of copper) = 32.9 * 10 ^ -8 kg / C.

The consumed electricity to obtain pure copper is determined by the formula: Q = U * I * t = U * q = U * (m / k).

Calculation: Q = 0.4 * 500 / (32.9 * 10 ^ -8) = 6.08 * 10 ^ 8 J (608 MJ).

Answer: To obtain 500 kg of pure copper, 608 MJ of electricity will be required.

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