1. Not finding help here? Sign up for a free 30min 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!

How to calculate number of moles of H2O2 oxidized

  1. Sep 15, 2015 #1
    1. The problem statement, all variables and given/known data
    How many moles of hydrogen peroxide will be oxidized by 0.0045 moles of potassium permanganate in acidic solution?

    I am unable to think of how you get started?

    2. Relevant equations

    n - m/mm


    3. The attempt at a solution

    I've balanced the equation for an acidic solution: 2MnO4- + 6H+ + 5H2O2 -> 2Mn2+ + 5O2 + 8H2O

    I know, since it's balanced, the H202 has 5 moles per the 2 for MnO4-.

    I can't think of how to even get this started.
     
  2. jcsd
  3. Sep 15, 2015 #2

    DEvens

    User Avatar
    Education Advisor
    Gold Member

    How many moles of MnO4- do you have?

    If 5 moles of H2O2 are oxidized per 2 moles of MnO4- (I have NOT checked your arithmetic) then how many moles of H2O2 are oxidized by that many moles of MnO4-?
     
  4. Sep 15, 2015 #3
    So, I don't know if this is right, but .0045 is 9/4000th of 2, so then 9/4000*5 is the number of moles of H2O2 oxidized by .0045 moles of 2MnO4-.

    So, the answer should be .01125 moles?

    I don't know if that's right.
     
  5. Sep 15, 2015 #4

    Borek

    User Avatar

    Staff: Mentor

    Looks OK.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: How to calculate number of moles of H2O2 oxidized
  1. Oxidation Numbers (Replies: 10)

  2. Oxidation numbers. (Replies: 5)

  3. Calculating moles (Replies: 2)

  4. Calculating moles (Replies: 3)

Loading...