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Homework Help: Environmental / chemical engineering problem

  1. Sep 13, 2011 #1
    *this is the same post i made in the chemistry forum, mods please delete that one.*

    I have a environmental engineering problem to do for homework, it goes like this:

    How many mg/L of magnesium ion will remain in solution in water that is 0.001000 M in hydroxyl ion and at 25 degrees celsius?

    the answer is 0.1367 mg/L, but i dont know how it was found.

    to be honest im not even sure where to begin, for some reason i cant find the section in my book that deals with problems like this. if anyone could point me in the right direction id greatly appreciate it, or maybe tell me what topic i should look under in my book.

    thank you
  2. jcsd
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