Give Two Examples for Acidic Buffer?

Two common examples of acidic buffer solutions are:

1. Acetic acid and sodium acetate (CH₃COOH + CH₃COONa)
2. Carbonic acid and sodium bicarbonate (H₂CO₃ + NaHCO₃)

An acidic buffer is a solution that maintains an acidic pH and resists changes in pH when small amounts of acid or base are added. It is usually made by mixing a weak acid with its salt formed from a strong base.

For example, in the case of acetic acid and sodium acetate:

• Acetic acid is a weak acid.
• Sodium acetate is its salt with a strong base (sodium hydroxide).

When H⁺ ions (acid) are added, the acetate ions from the salt react with them, minimizing the change in pH. When OH^- ions (base) are added, the acetic acid neutralizes them.

Such buffer systems are important in biological systems and chemical reactions to maintain a stable pH environment.