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Homework Help: PH comparisons of acidic solutions

  1. Jul 24, 2013 #1
    1. The problem statement, all variables and given/known data

    I'm working on a practice exam and we have a question asking us to choose the solution that has the lower pH (most acidic).

    a) 0.1 M NaNO3 or 0.1 M KCH3CO2

    b) 0.1 M NH4Br or 0.1 M NClO4

    c) 0.1 M Fe(NO3)3 or 0.1 M CaCl2

    d) 0.1 M NH3 or 0.1 M NaI

    e) 0.1 M NH4CH3CO2 or 0.1 M NaCH3CO2

    2. The attempt at a solution

    I've read through some examples we did in class and what I thought it came down to was remembering which were strong and weak acids. I also just read something about transition metals? I thought that transition metals did not have an affect on pH? Or was that something else?
  2. jcsd
  3. Jul 25, 2013 #2
    Try to figure out which are neutral, bases and acids.
    eg nitrates are neutral and and salts of weak acids are (weak) basic
    and salts of weak bases are (weak) acidic
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