Chemistry

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How many hours will it take to produce 78.0 g of Al metal by the reduction of Al3+ in an electrolytic cell with a current of 2.00 Amperes? [Enter only a number for your answer.]

  • Chemistry -

    78.0 g Al.
    96,485 coulombs will reduce 26.98/3 g Al or 96,485 C will reduce approximately 9 g (but you need to do it more accurately). We want to reduce 78.0; therefore, we will need
    96,485C x 78.0/9 = about 836,200 C.
    Amperes x seconds = C
    Substitute and solve for seconds, then convert to hours.

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