BIOCHEMISTRY

Calculate the formal concentrations of acetic acid and sodium acetate necessary to prepare a buffer solution of pH 5 that is 0.20M in total acetate?

  1. 👍
  2. 👎
  3. 👁
  1. You need two equations to solve simultaneously. Equation 1 is the Henderson-Hasselbalch equation.
    pH = pKa + log (base)/(acid)
    5 = pKa + log (base/acid)
    Substitute and solve for ratio (base)/(acid).

    Equation 2 is
    (acid) + (base) = 0.2 M

    Solve the two equations for (base) and (acid) and you have your answers. acetic acid is the acid and sodium acetate is the base.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    100 mL 0.1 M sodium acetate solution is mixed with 50 mL 0.1 M acetic acid. If now 0.937 mL of 1 M sodium hydroxide is added to the buffer what is the change in pH? pKa (acetic acid) = 4.76

  2. Chemistry

    You are asked to prepare 500. mL of a 0.150 M acetate buffer at pH 5.00 using only pure acetic acid, 3.00 M NaOH, and water. Calculate the quantities needed for each of the following steps in the buffer preparation. 1. Add acetic

  3. Science- Chemistry

    How many grams of sodium acetate( molar mass 82.03 g/mol) must me added to 1.00L of a 0.200M acetic acid solution to form a buffer of 4.20?Ka value for aceic acid is 1.8 x 10^-5. How do I go about finding the grams from the given

  4. chem

    Which of the following could be added to a solution of sodium acetate to produce a buffer? ? A) acetic acid only B) acetic acid or hydrochloric acid C) potassium acetate only D) sodium chloride or potassium acetate E) hydrochloric

  1. Chemistry

    What is the pH of a buffer solution of 0.125M Acetic acid and 0.250M Sodium acetate? the Pk of Acetic acid is 4.76

  2. Chemistry

    Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL

  3. Chemistry

    You want to prepare a pH=4.50 using sodium acetate and glacial acetic acid. You have n hand 300 mL of 0.100 M sodium acetate. How many grams of glacial acetic acid should you add to prepare the buffer? (Ka of acetic acid is 1.8e-5

  4. Chemistry

    A solution buffered at a pH of 5.00 is needed in an experiment. Can we use acetic acid and sodium acetate to make it? If so, how many moles of NaC2H3O2 must be added to a 1.0L of a solution that contains 1.0 mol HC2H3O2 to prepare

  1. Biochemistry

    Show Calculations used in mkaing 250mL of 0.5M sodium acetate ph 4.7. You are given: 1M acetic acid (weak acid) 1M sodium hydroxide (strong base) Sodium acetate buffer: ph 4.7 acetic acid pKa: 4.7 So far this is what I've gotten:

  2. chemistry

    If you add 5.0 mL of 0.50 M NaOH solution to 20.0 mL to Buffer C, what is the change in pH of the buffer? (where buffer C is 8.203 g sodium acetate with 100.0 mL of 1.0 M acetic acid) I have calculated the pH of buffer C to be

  3. school

    What is the pH of 0.1 M formic acid solution? Ka=1.7„e10-4? What is the pH value of buffer prepared by adding 60 ml of 0.1 M CH3COOH to 40 ml of a solution of 0.1 M CH3COONa? What is the pH value of an acetate buffer (pK=4.76)

  4. AP Chem

    Calculate the correct volumes of the 0.1M acetic acid solution and the 0.1M sodium acetate solution needed to make 50mL of a buffer solution with a pH vaule of 5.00. (Ka = 1.8x10^-5)

You can view more similar questions or ask a new question.