Chemistry

posted by .

100 mL of 1.0 M formic acid (HCOOH) is titrated with 1.0 M sodium hydroxide (NaOh).

The Approximate pKa is 4

At the pKa, what fraction of the carboxyl group will have been converted to COO-?

  • Chemistry -

    Do you mean at a pH = pKa, what is the fraction?
    pH = pKa + log(base)/(acid)
    4 = 4 + log (base)/(acid)
    (base)/(acid) = 1
    So 50% has been converted.

  • Chemistry -

    es

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Biochemistry

    Find the net charge of cysteine at pH 8.75 using the follwing pka values: carboxyl group has pka=1.9 amino group pka= 10.7 side chain=8.4
  2. college chemistry

    In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong acid. Given that the final NH3 concentration (approximate) is 0.2M and that pKa for NH4+ is 9.2, choose the …
  3. CHEMISTRY

    In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong acid. Given that the final NH3 concentration (approximate) is 0.2M and that pKa for NH4+ is 9.2, choose the …
  4. Chemistry HELP

    40.0 mL of 0.1880 M formic acid is titrated with 30.0 mL of 0.2010 M NaOH. Pka of formic acid is 3.8. What is the pH of the titration?
  5. chemistry

    Most organic acids can be represented as RCOOH, where COOH is the carboxyl group and R is the rest of the molecule. (For example, R is CH3 in acetic acid, CH3COOH). (a) Draw a Lewis structure for the carboxyl group. (b) Upon ionization, …
  6. Analytical Chemistry 2

    Consider the titration of the weak acid HA with NaOH. At what fraction of Ve does pH = pKa - 1?
  7. Chemistry help!!

    Consider the titration of the weak acid HA with NaOH. At what fraction of Ve does pH = pKa - 1?
  8. chem -please help!!!!!!!!!!!!

    An unknown compound, X, is though to have a carboxyl group with a pKa of 2.0 and another ionizable group with a pKa between 5 and 8. When 75 mL of 0.1M NaOH is added to 100 mL of a 0.1M solution of X at pH 2.0, the pH increases to …
  9. DrBob222 : need help with the problem

    An unknown compound, X, is though to have a carboxyl group with a pKa of 2.0 and another ionizable group with a pKa between 5 and 8. When 75 mL of 0.1M NaOH is added to 100 mL of a 0.1M solution of X at pH 2.0, the pH increases to …
  10. chemistry

    At equilibrium, a solution of formic acid at 25°C has a pH of 2.18. The pKa of formic acid, HCOOH, is 3.74. Which of the following is the initial concentration of the solution?

More Similar Questions