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Homework Help: Equilibrium question

  1. Dec 9, 2009 #1
    Hey guys, I've tried this question a couple different ways. Please help!

    1. The problem statement, all variables and given/known data

    Calculate the concentration of the acetate ion (M) in a solution prepared by dissolving 1.00×10-3 mol of HCl(g) in 1.00 L of 1.90 M aqueous acetic acid. Ka = 1.7E-5

    And at that point I'm not sure what to do.

    2. Relevant equations

    ........ CH3COOH --> CH3COO- + H+
    initial: 1.90 M 0 0
    change: - x +x +x
    equlbm: ~1.9 x x

    3. The attempt at a solution

    I did some calculations and found that x = 5.68E-3 . I that didn't take the HCl into consideration, though - I really have no idea what to do with that. i
  2. jcsd
  3. Dec 10, 2009 #2


    User Avatar

    Staff: Mentor

    As you were already told at CF - concentration of H+ should account for the HCl. It is fully dissociated.

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