If in using a lead-acid battery to start a car, 1.00 gram of Pb is consumed on the anode, how long will it take to recharge the battery, using a current of 0.500 amperes, and turn the PbSO₄ that was produced back into Pb?

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Quizplus · Accepted Answer

To find the time to recharge, calculate the moles of Pb consumed, then the moles of electrons needed, and finally use the current to find the time. 1.00 g of Pb is 0.00483 mol. Each Pb requires 2 moles of electrons, so 0.00966 mol of electrons are needed. Using Faraday's constant (96485 C/mol), the total charge is 933.5 C. With a current of 0.500 A, time = charge/current = 933.5 C / 0.500 A = 1867 s, which is approximately 31.1 minutes.

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