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:
pH = pKa + log (A-/HA-)
4.7=4.7 + log (A-/HA-)
0 = log (A-/HA-)
(A-/HA-) = 1
A- = HA -

0.5M x 0.25L = 0.125 moles of each to 250 mL of water.

Not sure if correct.
Thank you!

  1. 👍 0
  2. 👎 0
  3. 👁 897

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    You are a work study student in our chemistry department. Amy, your supervisor has just asked you to prepare 250ml of 2.00M H2SO4 solution for tomorrow's undergraduate experiment. The Stock Solutions cabinet is under the Stockroom

  2. Chemistry

    Calculate the solid needed to make a 250ml solution that is 0.34M in sodium cation, using sodium sulfate decahydrate. I came up with 13.685g. but how do I make that into 250ml of a solution that is0.34M in sodium cation?

  3. Chemistry

    An acetic acid buffer solution is required to have a pH of 5.27. You have a solution that contains 0.01 mol of acetic acid. How many moles of sodium acetate will you need to add to the solution? The pKa of acetic acid is 4.74.

  4. 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. 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)

  2. 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

  3. Chemistry

    What mass in grams of a 0.500 m(molal) solution of sodium acetate, CH3CO2Na, in water would you use to obtain 0.200mol of sodium acetate?

  4. Chemistry

    Write the following into a balanced equation. a) When a mixture of copper (II) oxide and carbon is heated, elemental copper forms and carbon monoxide evolves into the atmosphere. b) When a concentrated solution of sodium hydroxide

  1. Chemistry

    1) When aqueous solutions of cupric chloride and sodium phosphate are mixed, solid cupric phosphate separates from a solution of sodium chloride. 2) When heated in an aqueous solution of ammonium acetate, calcium oxide reacts to

  2. engineering

    To make a pocket warmer from sodium acetate and vinyl, how do you estimate how many grams to use? to work out the 'q' is it the heat capacity of the water it is dissolved in that you use? What temperature do you want it to get to

  3. chemistry

    5.85g of sodium chloride is dissolved in 250mL of solution. Calculate: a)the molarity of the solution b)the mass percentage of the solute. can we use the given volume(i.e,250mL as total volume of the solution or volume of water in

  4. Chemistry

    Calculate pH of an acetate buffer containing 27.5 mM acetic acid (pKa is 4.74) and 50 mM sodium acetate. When a 30 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.8. Calculate the amount of acetic acid

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