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!

Percentage calculation of chromium compound

  1. Sep 2, 2009 #1
    1. The problem statement, all variables and given/known data
    20g of Cr2(SO4)3 was used to make up an 800 ml batch of tanning liquor. When the tanning process was complete, a 10ml sample was taken and the chromium remaining in the sample was determined.
    The chromium in the sample was oxidised to dichromate and then titrated with a 0.100molL solution of iron 2 ions.
    Given that 16.5ml of the iron solution was needed, determine the percentage of the chromium used up in the tanning process


    2. Relevant equations



    3. The attempt at a solution
    I am unsure as to how to get an answer, I get the number of moles of Cr3+ used in tanning but I don't know how to get a percentage of chromium.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 2, 2009 #2

    Borek

    User Avatar

    Staff: Mentor

    What is percentage definition?

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




Similar Discussions: Percentage calculation of chromium compound
Loading...