How Does the Buffering Action of Weak Acids Change During Titration?

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SUMMARY

The buffering action of weak acids, specifically acetic acid, during titration with strong bases like NaOH is characterized by the equilibrium shift between hydronium ions (H+) and acetate ions. In the buffering region near the pKa, the addition of OH- primarily reacts with undissociated acetic acid rather than free H+ ions, leading to the formation of acetate ions. This process maintains the pH stability within the buffering range, as the concentration of undissociated acetic acid is significantly higher than that of H+.

PREREQUISITES
  • Understanding of acid-base chemistry and equilibrium
  • Familiarity with titration curves and pKa concepts
  • Knowledge of weak acids and their dissociation in solution
  • Basic grasp of the reaction between acids and bases, specifically H+ and OH- interactions
NEXT STEPS
  • Study the concept of buffer solutions and their applications in chemistry
  • Learn about the Henderson-Hasselbalch equation for calculating pH in buffer systems
  • Explore titration techniques and how to construct titration curves for various acids
  • Investigate the role of different weak acids and their buffering capacities in various pH ranges
USEFUL FOR

Chemistry students, educators, and laboratory technicians who are involved in acid-base titration experiments and those seeking to understand the behavior of weak acids in buffering solutions.

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Homework Statement


I'm a little confused, let's say i do a titration curve for a weak acid, at some point there's a buffering range near the pKa. Like i know that if we add a strong base like NaOH to acetic acid in a water solvent, then the OH- will combine with the H+ (hydronium ion) which will shift the equilibrium towards the acetate ion and hydronium ion. But will a different process occur when we add the OH- in the buffering region? Like in my book, it says that it will react with the acetic acid which will form the acetate ion...but i just don't see why this occurs differently then when the OH- reacted with the hydronium ion...
any help/clearing up would be much appreciated

Homework Equations


The Attempt at a Solution

 
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It is not much different - in both cases it is like H+ reacting with OH-. However, in the solution of acetic acid there is - like - a lot of undissociated acetic acid, usually much more than H+. Hence we say OH- reacts with acetic acid, not H+.

Like.
 
Borek said:
It is not much different - in both cases it is like H+ reacting with OH-. However, in the solution of acetic acid there is - like - a lot of undissociated acetic acid, usually much more than H+. Hence we say OH- reacts with acetic acid, not H+.

Like.

Like, are you like annoyed by like the way I'm like writing my message? Like, if you like don't like it, like i suggest like you like find something else to like you know worry about besides like the way i write.

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