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Homework Help: Reaction rates

  1. Feb 15, 2009 #1
    1. The problem statement, all variables and given/known data

    okay so im going to do a lab on reaction rates, theres a table given (effects of varying concentration)

    there are 9 reactions, I will just give one, ( if i can figure this out ill figure out the rest on my own)

    so reaction #1 flask A contains 7.50mL of .200M KI
    none of .20 M KCI
    .0050 M S2O3^-2
    1 drop of starch
    flask B contains 7.5 mL of .100M S2O8^-2

    It says for each reaction determine the concentration of KI, (NH4)2S2O8, and Na2S2O3 that will be present when solution A and B are mixed together. the total volume for each reaction is 20.0 mL.

    2. Relevant equations

    M1V1=M2V2 ?

    3. The attempt at a solution

    I'm not sure how to begin this, would I have to use the M1V1=M2V2 ? how would I set it up ?
  2. jcsd
  3. Feb 16, 2009 #2


    User Avatar

    Staff: Mentor

    Correct dillution equation (that's just mass balance) now you have to assign volumes and known concentration to symbols.
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