Question

question 78 (1 point) listen which of the following is false for a buffered solution? 1) the solution is made of a weak acid (or base) and the salt of its conjugate. 2) the solution will not change its ph very much even if a concentrated acid is added. 3) the solution will not change its ph very much even if a strong base is added. 4) any h⁺ ions added will react with a conjugate base of a weak acid already in solution. 5) a buffer will prevent chemical reactions from happening.

Explanation:

• A buffer solution is made of a weak acid (or base) and its conjugate salt (so option 1 is true).
• Buffers resist pH change when acid (option 2, the conjugate base reacts with added \(H^+\)) or base (option 3, the weak acid reacts with added \(OH^-\)) is added.
• Option 4 is true as added \(H^+\) reacts with the conjugate base.
• Option 5 is false: buffers only resist pH change, not prevent all chemical reactions.

Answer:

1. A buffer will prevent chemical reactions from happening.