Question

Write the equilibrium equation for the acetic acid/acetate buffer system. The formula of acetic acid is CH3CO2H .

Answer 1

Answer:

CH₃COOH ⇄ CH₃COO⁻ + H⁺

Explanation:

Hello,

Acetic acid is a weak acid that dissociates to give acetate and hydrogen ion in the solution. The system is at equilibrium with each other can the extent of dissociation can be given as a constant which is usually expressed as pKa.

pKa = -Log(Ka)

A buffer solution is a solution that avoids or resist a change in the pH value when an alkali or acid is added to the solution. Buffer solution usually shifts equilibrium so as to annul the effect of either the alkali or acid.

Equation of reaction.

CH₃COOH ⇄ CH₃COO⁻ + H⁺

Ka = [CH₃COO⁻][H⁺] ÷ [CH₃COOH]