Purification of copper can be achieved by electrorefining copper from an impure copper anode onto a pure copper cathode in an electrolytic cell. How many hours will it take to plate 14.0 kg of copper onto the cathode if the current passed through the cell is held constant at 41.0 A? Assume the copper in the electrolytic solution is present as Cu²+. time: h

Write the cell notation for an electrochemical cell consisting of an anode where Cr (s) is oxidized to Cr3+ (aq) and a cathode where Cr3+ (aq) is reduced to Cr2+ (aq) at a platinum electrode . Assume all aqueous solutions have a concentration of 1 mol/L and gases have a pressure of 1 bar.

The electrolysis of magnesium chloride can be used to produce elemental magnesium. MgCl2(l) → Mg(l) + Cl2(g) How many grams of magnesium are produced if a current of 5.50 A is passed through the electrolysis cell for 35.00 minutes? Report your answer to 4 significant digits.

Thomas Edison invented an electric meter that was nothing more than a simple coulometer, a device to measure the amount of electricity passing through a circuit. In this meter, a small, fixed fraction of the total current supplied to a household was passed through an electrolytic cell, plating out zinc at the cathode. Each month the cathode could then be removed and weighed to determine the amount of electricity used. If 0.25% of a household’s electricity passed through such a coulometer and the cathodeincreased in mass by 1.83 g in a month, how many coulombs of electricity were used during that month?