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Homework Help: What is the concentration of bromide present in a 0.659 M. solution of CaBr2

  1. Aug 17, 2010 #1
    1. The problem statement, all variables and given/known data

    The arsenic in a 1.42 g sample of pesticide was converted to AsO43- by suitable chemical treatment. It was then titrated using Ag+ to form Ag3AsO4 as a precipitate. If it took 33.7 mL of 0.113 M Ag+ to reach the equivalence point in this titration, what is the mass percentage of arsenic in the pesticide?

    2. Relevant equations

    im not sure

    3. The attempt at a solution

    I just need a way to get the ball rolling, this is a questions for my AP Chemistry summer review and i havent taken chemistry since sophomore year (im going to be a senior when school starts in two days) and i forgot the equations i need to solve this kind of stuff.
    Last edited: Aug 17, 2010
  2. jcsd
  3. Aug 18, 2010 #2


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