chemistry

posted by .

a) Calculate the percent ionization of 0.125M lactic acid (Ka=1.4x10^-4) b) Calculate the percent ionization of 0.125M lactic acid in a solution containing 0.00075 M sodium lactate.

  • chemistry -

    Lactic acid = HL, sodium lactate = NaL.

    ..........HL ==> H^+ + L^-
    I...... 0.125....0.....0
    C.........-x.....x.....x
    E......0.125-x...x.....x

    Substitute the E line into Ka expression and solve for x = (H^+), the
    % ion = [((H^+)/(HL)]*100 = ?

    for b part, plug into Ka expression the following concns:
    Remember NaL is 100% ionized in solution.
    .........NaL ==> Na^+ + L^-
    I......7.5E-4.....0......0
    C.....-7.5E-4....7.5E-4..7.5E-4
    so final concns are
    (H^+) = x
    (L^-) = x from HL + 7.5E-4 from NaL to make x + 7.5E-4
    (HL) = 0.125-x

    These are plugged into the Ka expression and solve for x = (H^+), then
    %ion = [(H^+)/(HL)]*100 = ?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Lactic acid, HC3H5O3(aq) is a weak acid that gives yougurt its sour taste(Yeeeeecccckkk). Calculate the pH of a 0.0010 mol/L solution of Lactic acid. The Ka for lactic acid is 1.4 x 10^-4
  2. chemistry

    Lactic acid, HC3H5O3(aq) is a weak acid that gives yougurt its sour taste(Yeeeeecccckkk). Calculate the pH of a 0.0010 mol/L solution of Lactic acid. The Ka for lactic acid is 1.4 x 10^-4 For Further Reading chemistry - DrBob222, Saturday, …
  3. Dr Bob

    What is the pH of the solution that results from mixing 5 ml of 0.2 M NaOH and 100 mL of 0.05 M lactic acid?
  4. Chemistry

    A lactic acid/lactate ion buffer solution contains 0.19 M HC3H5O3 and 0.78 M C3H5O3-, respectively. The Ka value of lactic acid is 1.4*10^-4. Calculate the pH of this buffer.
  5. Chemistry

    Calculate the percent ionization of 0.120 M lactic acid (Ka=1.4*10^-4).
  6. Chemistry

    The Ka of a monoprotic weak acid is 8.11 x 10 ^ -3. What is the percent ionization of a 0.125M solution of this acid?
  7. Chemistry

    Calculate the percent ionization of 0.140 M lactic acid in a solution containing 8.5×10−3 M sodium lactate.
  8. chemistry

    Lactic acid, CH 3 CHOHCO 2 H, is found in sour milk, in sauerkraut, and in muscles after activity. K a for lactic acid = 1.4 x 10 -4 . a. If 2.75 g of NaCH 3 CHOHCO 2 , sodium lactate, is added to 5.00 x 10 2 mL of 0.100 M lactic acid, …
  9. chemistry

    A lactic acid/lactate ion buffer solution contains 0.43M HC3H5O3 and 0.90M C3H5O3-. The value of lactic acid is 1.4*10-4 calculate the pH of this buffer
  10. Chemistry

    Lactic acid is a major component of Ringer’s solution, which is used as an intravenous fluid to maintain fluid balance in trauma patients. The pH of a 0.100 M lactic acid solution is around 2.44. Based on this information, determine …

More Similar Questions