chemistry

posted by .

A buffer consists of 0.14 M KHCO3 and 0.61 M K2CO3. Carbonic acid is a dirpotic acid with Ka1= 4.5*10^-7 and Ka2= 4.7*10^-11.
a) which Ka value is more important to this buffer
b) what is the buffer pH?

  • chemistry -

    Look at the constituents of k1 and k2 and choose the one that matches the reaction.
    You have HCO3^- and CO3^2- in the problem.
    Write k1 and k2 expressions. Then determine which one has HCO3^- and CO3^2- in it.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Whatis the pH of a buffer that results when 0.05mol of Na3PO4 is mixed with 0.75 mol of HCl and diluted with water to 1.00L. (The acid dissociation constants for phospohoric acid are Ka1=7.5*10^-3, Ka2=6.2*10^-8 and Ka3=3.6*10^-13).
  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?
  3. school

    What is the pH of 0.1 M formic acid solution?
  4. Chemistry

    A buffer consists of 0.16 M KHCO3 and 0.39 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 10-7 and Ka2 = 4.7 10-11. (a) Which Ka value is more important to this buffer?
  5. Chemistry

    Select the statements that correctly describe buffers.?
  6. chemistry 2

    You are instructed to create 800. mL of a 0.69 M phosphate buffer with a pH of 7.6. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. what is the molarity needed for the acid component of the buffer?
  7. CHEMISTRY

    I have trouble how to resist pH in buffer solutions ( in acidic buffer , and in basic buffer ) when we add an acid , and a base ! how the reactions in buffer follow Le chatlier's principle ?
  8. Chemistry

    The pH of a buffer can be predicted using the Hendersen-Hasselbach equation: pH=pKa+ log([conjugate base][conjugate acid]) The choice of the conjugate acid-base pair (as you did in the previous questions) determines the pKa value to …
  9. Chem 2

    You are instructed to create 600. mL of a 0.56 M phosphate buffer with a pH of 7.6. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) …
  10. Chemistry

    A buffer contains the weak acid HA abd its conjugated base A-. The weak acid has a Ka of 1.51 x10^-5 and the buffer has a pH of 4.25. Which statement is true about the relative concentrations of HA and A- in the buffer?

More Similar Questions