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Chemistry Kinetics help

  1. Jul 8, 2016 #1
    1. The problem statement, all variables and given/known data
    Hydrolysis of ethyl lactate

    Determine the value of the rate constant for the hydrolysis of ethyl lactate from the following data.

    Mass of ethyl lactate (grams): 0.5956
    Concentration of stock HCl solution (M): 0.01023

    Standardization titration volumes (of NaOH):

    Run Vi (mL) Vf(mL)
    1 0.60 15.58
    2 15.58 30.66
    3 30.66 45.66

    Kinetics data:
    Run Reaction time (seconds) Vi(mL) Vf(mL)
    0 0
    1 308 1.72 4.32
    2 742 4.32 8.88
    3 1303 8.88 14.84
    4 1910 14.84 21.66
    5 2550 21.66 29.06

    Rate constant = ?????

    2. Relevant equations
    equations are below

    3. The attempt at a solution
    the rate equation is -d[OH-]/dt = k[OH-][EtL]

    but I'm not sure how to find the concentration of OH and the concentration of Ethyl lactate is 0.01203

    and then a = 1/2[OH-]o + [Etl]o
    1/a-x - 1/a = kt
     
  2. jcsd
  3. Jul 9, 2016 #2

    Borek

    User Avatar

    Staff: Mentor

    What are the titrations for? What do they determine?

    OH- is just a catalyst and its concentration doesn't change during the hydrolysis, so your rate equation can't be right.
     
  4. Jul 11, 2016 #3

    epenguin

    User Avatar
    Homework Helper
    Gold Member

    This is really not set out clearly enough to understand or help with.
    What are Vi, Vf? What is measured how?
    Is this acid catalysis?
     
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