Homework Help: chemistry

Posted by Chris on Friday, October 26, 2012 at 1:16pm.

If a current of 5.0 Amps is passed through the electrolytic cell for .5 hour, how should you calculate the number of grams of bromine produced?

chemistry - DrBob222, Friday, October 26, 2012 at 3:07pm
5.0 amps x 0.5 hr x 60 min/hr x 60 min/s = 9,000 coulombs.
2Br^- ==> Br2 + 2e

You know that 96,485 coulombs will form 1 equivalent of Br2 which is 159.8/2 = 79.9 g Br2.
You have 9,000 coulombs; therefore, how much Br2 will be formed?
79.9 x (9,000/96,485) = ?

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