The Following Pictures Represent Solutions That Contain a Weak Acid

question 75

Multiple Choice

The following pictures represent solutions that contain a weak acid HA (pK_a = 5.0) and its potassium salt KA.Unshaded spheres represent H atoms and shaded spheres represent A^- ions.(K⁺,H₃O⁺,OH^-,and solvent H₂O molecules have been omitted for clarity. )
-Which of these solutions are buffers?

• A)(1)and (2)
• B)(1)and (3)
• C)(1), (2)and (3)
• D)All are buffer solutions.

---

Definitions:

External Benefit

A benefit that people other than the consumer or producer enjoy, resulting from a transaction or activity.

Economic Efficiency

A condition in which all available resources are utilized in the most effective manner to satisfy society's needs and wants, minimizing waste and maximizing value.

Market Price

The current market value at which an asset or service is up for sale or purchase.

External Benefits

Positive effects experienced by those not directly involved in an economic transaction.