Question

Which of the following statements is true about buffer solution?

• A. It keeps the pH value constant in a chemical reaction.
• B. It decreases the pH value in a chemical reaction.
• C. It increases the pH value in a chemical reaction.
• D. It first increases and then decreases the pH value in a chemical reaction.

Answer 1

The correct option is A It keeps the pH value constant in a chemical reaction.

Buffer solutions have the capacity to react with small amounts of added acid or base without affecting the hydrogen ion concentration of the solution. Thus, the buffer solutions help to keep the pH value constant in a chemical reaction.