chemistry

Chromium metal can be plated onto an object from an acidic solution of dichromate ions. What average current is required to plate 17.8 g of chromium metal in a time of 2.20 h?

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  1. amperes x seconds = coulombs.
    96,485 coulombs will deposit 1 equivalent weight of Cr.
    Equivalent weight Cr = atomic mass/change in number of electrons in the half reaction.

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