chemistry

calculate the pH of a 1.94M solution of nitrous acid (HNO2 - ka = 4.5E-4).

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asked by Tara
  1. Set up an ICE chart, something like the following:
    ............HNO2 ==> H^+ + NO2^-
    initial....1.94M.....0.......0
    change......-x.......+x.......+x
    final......1.94-x.....x........x

    Ka = (H^+)(NO2^-)/(HNO2)
    Substitute from the ICE chart to the Ka expression, solve for x and convert to pH.

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  2. for .148M it is 2.00

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