Question

buffers are choose choose that can react with strong acids and bases to

Explanation:

To answer the question about buffers, we recall the definition of a buffer:

Buffers are solutions (or more precisely, mixtures) that contain a weak acid and its conjugate base (or a weak base and its conjugate acid). These components react with strong acids (to neutralize \( \text{H}^+ \)) and strong bases (to neutralize \( \text{OH}^- \)) to resist changes in pH.

Answer:

The first “Choose” (describing what buffers are) should be filled with: solutions containing a weak acid and its conjugate base (or weak base and its conjugate acid).
The second “Choose” (describing their role) relates to resist pH changes (by reacting with strong acids/bases to neutralize excess \( \text{H}^+ \) or \( \text{OH}^- \)).

(Note: If this is a dropdown question with standard options, typical answers for the first blank are “solutions containing a weak acid and its conjugate base” (or similar) and for the second, “maintain a stable pH” or “resist pH changes”.)