What is the dissociation constant of acetic acid in water?

In summary, Acetic acid is a colorless, organic compound commonly known as the main component of vinegar. It acts as a proton donor, meaning it releases a proton in water, and this is significant in various chemical reactions. Acetic acid is used in industries such as food and beverage, pharmaceutical, and chemical manufacturing. While it is safe for human consumption in small amounts, high concentrations can be harmful.
  • #1
Thecla
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TL;DR Summary
can pure acetic acid donate a proton to itself the same as pure water donates a proton to itself to form hydronium ion?
The solubility product for water is 10 to the minus fourteenth power.(water forming hydronium ion and its complement). What is the solubility product of pure acetic acid forming HHOAC(+) and OAC(-) ?
 
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  • #2
Yes. Google “acetic acid self-ionization.”
 
  • #3
Many acids do the same, including H2SO4.
 
  • #4
That's not a solubility product, it's a dissociation constant.
 
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1. What is acetic acid?

Acetic acid, also known as ethanoic acid, is a clear, colorless liquid with a pungent odor. It is a weak acid commonly found in vinegar and is used in various industrial and household applications.

2. How does acetic acid act as a proton donor?

Acetic acid is a weak acid, meaning it does not completely dissociate in water. However, it does release some of its hydrogen ions (protons) in aqueous solutions, making it a proton donor. This is due to the presence of a carboxyl group (-COOH) in its chemical structure, which is a common feature of weak acids.

3. What are the properties of acetic acid as a proton donor?

As a weak acid, acetic acid has a relatively low dissociation constant (pKa) of 4.76. This means that it is not a strong proton donor and does not completely dissociate in water. Additionally, acetic acid has a low molecular weight and is highly soluble in water, making it an effective proton donor in aqueous solutions.

4. How is acetic acid used as a proton donor in scientific research?

Acetic acid is often used as a proton donor in various chemical reactions, such as esterification and Fischer esterification. It is also commonly used as a solvent in organic synthesis, where it can act as a proton donor in acid-catalyzed reactions. In biological research, acetic acid is used as a fixative for tissue samples and as a preservative in cell culture media.

5. Are there any safety concerns when handling acetic acid as a proton donor?

Acetic acid is a corrosive substance and can cause skin and eye irritation. It should be handled with caution and proper protective equipment, such as gloves and goggles, should be worn. In large quantities, acetic acid can also be harmful if ingested or inhaled. It is important to follow proper safety protocols when working with acetic acid in a laboratory setting.

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