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!

Finding the excess after the reaction is complete (chem 101)

  1. Sep 12, 2010 #1
    When 2.0mL of 1.5M Ammonium Phosphate is mixed with 1.00 mL of 0.75 M Ferrous Acetate.


    The problem itself is in multiple parts.
    I have already found the limited reactant. But i need help finding "the grams of the reactant in excess after the reaction is complete."

    What i have so far...
    Ferrous Acetate is limiting reactant with theoretical yield of of 0.09g.
    Ammonium Phosphate has 0.54g of a theoretical yield.


    3. The attempt at a solution

    I have attempted this multiple times and have been searching the web as to how to do it...no positive results so far.
     
  2. jcsd
  3. Sep 12, 2010 #2

    Borek

    User Avatar

    Staff: Mentor

    Write reaction equation.

    How many moles of each reactant?

    How many moles of product?

    How many moles of each reactant was consumed during the reaction?

    --
     
  4. Sep 12, 2010 #3
    balanced equation:
    2(NH4)3PO4 +3Fe(C2H202)2 -> 6NH4(C2H202) + Fe2(PO4)2

    Im not sure how to obtain the rest of what you are asking.
     
  5. Sep 12, 2010 #4

    Borek

    User Avatar

    Staff: Mentor

    I already told you in the other thread. You know volume and concentration - start with concentration definition, solve for number of moles of substance.
     
  6. Sep 12, 2010 #5
    We have
    3e-3 moles of Ammonium Phosphate and
    7.5e-4 moles of Ferrous Acetate

    How do i find how many moles of the product i have and how many moles are consumed?
     
  7. Sep 13, 2010 #6

    Borek

    User Avatar

    Staff: Mentor

    Time to write and use reaction equation. You need to know what are stoichiometric coefficients.

    I think I have already directed you to the page where I explained how to read reaction equation.

    --
    methods
     
  8. Sep 25, 2010 #7
    Yes, thank you.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Finding the excess after the reaction is complete (chem 101)
  1. Chem reactions (Replies: 2)

  2. Chem. Half-Reactions (Replies: 1)

Loading...