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!

Percent Ionization Ka

  1. Feb 25, 2010 #1
    1. The problem statement, all variables and given/known data
    What concentration of formic acid would give an aqueous solution in which 2.85 percent of the formic acid molecules are ionized? Assume that Ka for formic acid is 1.80E-4 .


    2. Relevant equations



    3. The attempt at a solution

    X^2 / .0285 - X = 1.8E-4
    X = .00226
    M = .0285 - .00226 = .0262M
    This is wrong. Any ideas?
     
  2. jcsd
  3. Feb 25, 2010 #2

    chemisttree

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Let X be the concentration of formic acid before dissociation. 0.0285X represents what?

    Can you get there from here?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Percent Ionization Ka
  1. Calculating Ka (Replies: 2)

  2. Ka estimate (Replies: 4)

Loading...