1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook