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What is buffer action

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What is buffer action
  • 3 answers

Ashish Soni 6 years, 4 months ago

Buffer action: the ability of the buffer solution to resist the changes in pH value on the addition of small amount of an acid or a base is known as buffer action.

Manjeet Singh 6 years, 4 months ago

The property by which it resist theft change in ph value

Amar Kumar 6 years, 4 months ago

Buffer action: the ability of the buffer solution to resist the changes in pH value on the addition of small amount of an acid or a base is known as buffer action.

For example: consider an acidic buffer such as a solution containing an equimolar amounts of acetic acid and sodium acetate, the solution contains a large number of sodium ions (Na+), acetate ions (CH3COO) and also a large number of undissociated acetic acid molecules.

CH3COONa (aq) ————-> CH3COO(aq) + Na+ (aq)

Suppose, a few drops of HCl are added to this buffer solution. This would provide hydrogen (H+) ions. These additional H+ ions would combine with the large reserve of CH3COOions to form undissociated acetic acid molecules.

CH3COO (aq) + H+ (aq) ⇌ CH3COOH

The additional H+ ions are neutralized by CH3COOions in the solution, hence there will be no change in its pH value. The reserve basicity of the solution is due to acetate ions.

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