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Related Concept Videos

Buffers02:56

Buffers

A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl...
Buffers: Overview01:30

Buffers: Overview

Buffers play a crucial role in stabilizing the pH of a solution by mitigating the effects of small amounts of added acid or base. They consist of a weak acid and its conjugate base or a weak base and its conjugate acid. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl (aq).
Buffer Systems in the Body01:19

Buffer Systems in the Body

Chemical buffers play a critical role in the body's regulation of pH levels. These systems contain one or more compounds that stabilize pH changes by neutralizing strong acids or bases. When pH levels drop, hydrogen ions bind to a weak base; when pH levels rise, hydrogen ions are released. This dynamic process helps maintain pH within a narrow and stable range essential for normal physiological function.
A typical buffer system in bodily fluids includes a weak acid and its corresponding anion,...
Buffer Effectiveness02:19

Buffer Effectiveness

Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes in pH relies on the presence of appreciable amounts of its conjugate weak acid-base pair. When enough strong acid or base is added to substantially lower the concentration of either member of the buffer pair, the buffering action within the solution is compromised.
The buffer capacity is the amount of acid or base that can be added to a given volume...
Buffers: Buffer Capacity01:09

Buffers: Buffer Capacity

Buffer capacity is the quantitative measure of a buffer to resist the change in pH. As shown in the following equation, the buffer capacity, denoted by 'beta', is expressed as the number of moles of acid or base needed to change the pH of a one-liter buffer solution by 1 unit. Here, Ca and Cb indicate the number of moles of acid and base, respectively. Note that dpH represents the change in pH.
In the graph, pH is plotted as a function of the number of moles of base (Cb) added to a weak acid...
Protein Buffers in Blood Plasma and Cells01:20

Protein Buffers in Blood Plasma and Cells

The human body utilizes protein buffer systems to maintain a stable pH. These systems capitalize on the dual role of amino acids, which can act as acids or bases by accepting or releasing hydrogen ions in response to pH changes. Protein buffer systems are particularly significant in the extracellular fluid (ECF) and intracellular fluid (ICF) of active cells, where structural and functional proteins provide substantial buffering capacity.
Certain amino acids can exist in a zwitterion state at a...

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Related Experiment Video

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Ionic liquid "buffers"-pH control in ionic liquid systems.

Douglas R Macfarlane1, R Vijayaraghavan, Huy N Ha

  • 1School of Chemistry, Monash University, Clayton, VIC, 3800, Australia. Douglas.MacFarlane@monash.edu

Chemical Communications (Cambridge, England)
|September 28, 2010
PubMed
Summary
This summary is machine-generated.

Hydrated ionic liquids offer intrinsic proton buffering, enabling precise control over proton activity in ionic solutions. This discovery is key for advanced electrochemical applications.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Physical Chemistry

Background:

  • Ionic liquids are tunable solvents with diverse applications.
  • Controlling proton activity is crucial in many chemical processes.

Purpose of the Study:

  • To introduce novel hydrated ionic liquids with inherent proton buffering capabilities.
  • To demonstrate their utility in managing proton activity.

Main Methods:

  • Synthesis and characterization of specific hydrated ionic liquids.
  • Proton activity measurements in ionic media.

Main Results:

  • The synthesized hydrated ionic liquids exhibit significant proton buffering action.
  • Effective control over proton activity was achieved in ionic solutions.

Conclusions:

  • Hydrated ionic liquids represent a new class of materials for proton activity regulation.
  • These findings open avenues for improved electrochemical systems and chemical reactions.