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Homework Help: Initial number of moles

  1. Oct 10, 2012 #1
    1. The problem statement, all variables and given/known data

    We are given a reaction: H2O2 + 2I- + 2H+ → 2H2O + I2 and are asked to find the initial number of moles of each reactant.

    V=10mL and C=0.2 mol/L for potassium iodide in the solution.
    V=5mL and C=0.5 mol/L for sulfuric acid in the solution.
    V=5mL and C=0.02 mol/L for hydrogen peroxide in the solution.

    2. Relevant equations

    n=CxV where n is the number of moles, C is the concentration, and V is the volume.

    3. The attempt at a solution

    I know we need to use the equation stated above but should we multiply by the coefficient or not?
  2. jcsd
  3. Oct 10, 2012 #2


    User Avatar

    Staff: Mentor

    You mean stoichiometric coefficients? No, just calculate concentration as if you were not knowing what the solution will be used for.
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