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Homework Help: Rate of Reactions?

  1. Oct 28, 2007 #1
    1. The problem statement, all variables and given/known data
    Why do scientists take the rate of a reaction at the beginning of an experiment?

    2. Relevant equations

    3. The attempt at a solution
    I would say because the amount of the reactants and present conditions are already known. But, there is a hint that says "think slow reactions." It may have something to do with the progress of the reaction?
  2. jcsd
  3. Oct 28, 2007 #2
    well the slow step is the rate-determining step, and it would be wise to observe an experiment from the beginning ... so it might occur at the get go.
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