AP Chemistry Buffers

A solution with a pH of 8.6 is

• Acidic

• Basic

• Neutral

• none of these

An acid is a substance that releases

• H+ in a water solution

• OH- in a water solution

If a substance is acidic, what could be added to raise the pH?

• Sulfur

• Nitrogen

• Vinegar

• Baking Soda

"Alkaline" is another word for a substance that changes pH paper to blue. This means "alkaline"=

• base

• acid

• buffer

• none of these

What is the primary function of a buffer solution in a chemical system?

• To maintain a constant temperature

• To resist changes in pH

• To increase the rate of reaction

• To change the color of the solution

Which of the following pairs can act as a buffer solution?

• Hydrochloric acid and sodium chloride

• Acetic acid and sodium acetate

• Sulfuric acid and sodium sulfate

• Nitric acid and potassium nitrate

A buffer solution is made by mixing 0.1 M acetic acid and 0.1 M sodium acetate. What will happen if a small amount of hydrochloric acid is added?

• The pH will significantly decrease

• The pH will significantly increase

• The pH will remain relatively constant

• The solution will become neutral

Which equation represents the Henderson-Hasselbalch equation used for buffer solutions?

In a buffer solution containing acetic acid and sodium acetate, what role does the acetate ion play?

• It acts as a strong acid

• It acts as a weak base

• It acts as a strong base

• It acts as a neutral salt

What is the effect of adding a strong base to a buffer solution?

• The pH will increase significantly

• The pH will decrease significantly

• The pH will change slightly

• The pH will remain unchanged