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Chemistry

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A current of 4.60 A is passed through a Cr(NO3)2 solution for 1.10 hours. How much chromium is plated out of the solution?

  • Chemistry -

    each Cr ion needs two electrons.

    Number of electrons: Current*time/chargeonElectron

    4.6*1.1*60SECONDS/e

    put the charge on an electron e in, and compute.
    Then
    massCr=molesCr*molmassCr
    where molesCr=numberElectrons/2*1/avagnumber

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