Chemistry

posted by Annie

how would you do this question
when i did it i did -log(1.0) but that is just 0 so what it the procedure to do this question

Calculate the pH of a 1.0 mol/L aqueous solution of sodium benzoate. Note: Only the benzoate ion affects the pH of the solution.

  1. DrBob222

    Benzoate ion hydrolyzes in water to form a solution that is not neutral.
    If we call the benzoate ion Bz^-, then
    .........Bz^- + HOH ==> HBz + OH^-
    I........1.0..............0.....0
    C........-x..............x.....x
    E.......1-x..............x......x

    Kb for Bz^- = (Kw/Ka for HBz) = x*x/(1-x) and solve for x = (OH^-),then convert to pH.
    HBz is benzoic acid. You can find Ka for HBz in you text/notes I'm sure but it's approx 10^-5.

  2. Annie

    thanks

Respond to this Question

First Name

Your Answer

Similar Questions

  1. chemistry

    Please let me know if my answer to the following question is correct. Question: 25 mL of standardized 0.45 mol/L NaOH is titrated with 21 mL of 0.35 mol/L acetic acid. Calculate the pH of the solution. Answer: Add 25 mL and 21 mL to …
  2. Chemistry

    What is the pH of a 1.00 L solution of the following buffer 0.500 M propanoic acid (HC3H5O2 Ka = 1.30 × 10^−5) / 0.800 M sodium propanoate after the addition of 0.700 mol solid NaOH. I tried using the Henderson-Hasselbach equation …
  3. Chemistry

    What will be the pH of an aqueous solution containing 0.040 mol/L sodium hydroxide?
  4. chemistry help plzzz

    how can i calculate the pH of the solution obtained when 50.00mL of 0.150mol/L hydrochloric acid is added to 75mL of a 0.111 mol/L aqueous sodium hydroxide solution. need help i am stuck with that question thank you :)
  5. chemistry

    The mole fraction of an aqueous solution of sodium dichromate is 0.367. Calculate the molarity (in mol/L) of the sodium dichromate solution, if the density of the solution is 1.42 g mL-1.
  6. Chemistry

    I have had this question in my homework, and honestly I got stuck in these questions. I managed to convert 5.3g of Na2CO3 into moles, but then I got stuck and do not know what to do next to solve the question. If anyone knows how to …
  7. Chemistry

    First, the question I'm given is: What is the pH of a 1.0 L solution containing 0.25M acetic acid and 0.75M sodium acetate ( Ka for acetic acid= 1.8x 10-5) So I took the -log(1.8x10-5)= 4.74+log(.75/.25)= 5.22 pH But then I'm asked …
  8. Chemistry

    How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer?
  9. Reposting Chemistry Question -Emergency !!

    Saturated solution of Ca(OH)2 in 0.05349 mol/L NaOH. Temperature: 22.1 * C Volume of Ca(OH)2/NaOH aliquot: 25ml Concentration of Standard HCl: 0.1213M Indicator Used: Bromothymol Blue Ksp from previous part I got 3.55x10^-5 - Average …
  10. chemistry

    1. (Answer c)The hydroxide ion concentration in a 1.0 mol/L solution of acetic acid at 25°C is a.4.2 x 10^-3M b.2.4 x 10^-11M c.2.4 x 10^12M d.2.4 x 10^-3M e.1.8 x 10^-5M I did [OH-]=root(Kw/Ka) x [salt] [OH-]=root(1.00 x 10^-14/1.8 …

More Similar Questions