COnenta uonapa 2. Acetic acid and a salt containing its conjugate base, such as sodium acetate, form buffer solutions that are effective in the pH range 3.7-5.7. (a) In resisting a pH change, which buffer component would react with NaOH? Explain. (b) What happens to the buffer activity when this component is exhausted?

COnenta uonapa 2. Acetic acid and a salt containing its conjugate base, such as sodium acetate, form buffer solutions that are effective in the pH range 3.7-5.7. (a) In resisting a pH change, which buffer component would react with NaOH? Explain. (b) What happens to the buffer activity when this component is exhausted?

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter14: Acid- Base Equilibria

Section: Chapter Questions

Problem 4RQ: A good buffer generally contains relatively equal concentrations of weak acid and conjugate base. If...

See similar textbooks

Similar questions

Ammonia gas is bubbled into 275 mL of water to make an aqueous solution of ammonia. To prepare a buffer with a pH of 9.56, 15.0 g of NH4Cl are added. How many liters of NH3; at 25C and 0.981 atm should be used to prepare the buffer? Assume no volume changes and ignore the vapor pressure of water.
Sketch two pH curves, one for the titration of a weak acid with a strong base and one for a strong acid with a strong base. How are they similar? How are they different? Account for the similarities and the differences.
Sketch a titration curve for the titration of potassium hydroxide with HCl, both 0.100 M. Identify three regions in which a particular chemical species or system dominates the acid-base equilibria.
What mass of NH4Cl must be added to 0.750 L of a 0.100-M solution of NH3 to give a buffer solution with a pH of 9.26? (Him: Assume a negligible change in volume as the solid is added.)
A good buffer generally contains relatively equal concentrations of weak acid and conjugate base. If you wanted to buffer a solution at pH = 4.00 or pH = 10.00, how would you decide which weak acidconjugate base or weak baseconjugate acid pair to use? The second characteristic of a good buffer is good buffering capacity. What is the capacity of a buffer? How do the following buffers differ in capacity? How do they differ in pH? 0.01 M acetic acid/0.01 M sodium acetate 0.1 M acetic acid/0.1 M sodium acetate 1.0 M acetic acid/1.0 M sodium acetate
What are the [H₃O⁺] and the pH of a propanoic acid–propanoate buffer that consists of 0.35 M CH₃CH₂COONa and0.15 M CH₃CH₂COOH (Kₐ of propanoic acid=1.3X10⁻⁵)?
What mass (in grams) of sodium acetate (CH3COONa) must be added to 100.00 mL of a 0.115 M solution of acetic acid in order to prepare a buffer solution with a pH of 4.70? The Ka of acetic acid is 1.8 × 10−5. Mass of sodium acetate =
4. What mass (in grams) of sodium acetate (CH3COONa) must be added to 100.00 mL of a 0.109 M solution of acetic acid in order to prepare a buffer solution with a pH of 4.70? The Ka of acetic acid is 1.8 ×10−5. Mass of sodium acetate = ________g
Acid Base Equilibria: TitrationWhat is the pH of the buffer 0.10 M Na2HPO4/0.15 M KH2PO4?
What will be the pH of the buffer solution consisting of 94 mL butanoic acid (CH3CH2CH2COOH) 0.189 mol/L and 109 mL sodium butanoate (CH3CH2CH2COONa) 0.207 mol/L, if 10.9 mL KOH 0.5 mol/L is added?Give an answer to at least 3 decimal places.
A student needs to prepare a buffer made from HNO2 and NaNO2 with pH 3.655. If Ka for HNO2 is 4.50 x 10^-4, what ratio of [HNO2]/[NO2-] is required?
How many grams of sodium acetate must be added to 2.00L of 0.105M acetic acid to make a buffer that has a pH of 4.90? (Ignore volume changes due to the addition of the NaC2H3O2).