Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called________________?
Correct answer: A. buffer solution
- A. buffer solution
- B. normal solution
- C. standard solution
- D. neutral solution
Explanation
A buffer contains a weak acid and its conjugate base, or a weak base and its conjugate acid, so it consumes small added amounts of H+ or OH- and resists a large pH change. A normal or standard solution describes concentration, not resistance to pH change. Students may choose neutral solution because they associate pH control with pH 7, but a buffer can be acidic or basic.
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About Buffer Solutions
Buffer solutions resist changes in pH when small amounts of acid or base are added, using a weak acid and its conjugate base or a weak base and its conjugate acid. Work includes buffer action, the common-ion effect, Henderson-Hasselbalch calculations, buffer capacity, and the difference between acidic and basic buffers.
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