Posted by **Diana** on Monday, November 15, 2010 at 12:29pm.

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 -
**DrBob222**, Monday, November 15, 2010 at 5:48pm
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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