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Homework Help: Reaction between water and chromium metal

  1. Jun 1, 2013 #1
    Hi there,

    How to write the reaction between water and chromium metal under standard (i) acid and (ii) base condition?

    Cr + 3H2O ----> Cr(OH)3 + 3e- + 3 H+ (acid condition)

    basic solution ???

    Please help
  2. jcsd
  3. Jun 2, 2013 #2


    User Avatar

    Staff: Mentor

    In acid I would start with Cr and H+, yielding Cr3+.

    Cr(OH)3 is a correct product for alkaline solution, and I would assume OH- to be one of the reactants.

    In reality Cr is passivated by oxides, so its reactions are not that simple.
  4. Jun 3, 2013 #3
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