Buffer

Buffer is defined as

• ability to resist pH change

• ability to prevent pH from decreasing

• ability to resist a pH increase

• ability to resist pH change when small amount of acid added

What might happen if buffers did not exist within the human body?

• Our blood and other bodily fluids might become too acidic or basic.

• Our stomach acid would not be able to break down food.

• We would not be able to process glucose within our cells.

• We would not be able to inhale oxygen into our lungs.

Tags

NGSS.HS-LS1-3

Acidic buffer is made up of

• weak acid and weak base

• weak acid and its conjugate salt

• weak acid and its conjugate base

• strong acid and its conjugate base

Two beakers have liquids in them. When you add a base such as ammonia to beaker 1, the pH did not change. But when you add ammonia to beaker 2, the pH changes drastically. Choose the best explanation.

• Beaker 1 had only water and Beaker 2 contained a buffer.

• Beaker 1 contained a buffer and Beaker 2 contained only water.

• Beaker 2 contained an acid.

• The beaker that changed pH contained a buffer.

Mixtures that would be considered buffers include which of the following?

• I only

• II only

• III only

• II and III

The pH of body fluids is tabilised by buffer systems. which of te following is the most effective buffer system at physiological pH?

• Protein buffer

• Bicarbonate Buffer

• Phosphate Buffer

• All of the above

• UFFER

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

• To maintain a constant pH

• To increase the acidity

• To decrease the basicity

• To change the color of the solution

Which of the following is a common buffer system used in biological systems?

• Sodium chloride

• Bicarbonate buffer

• Sulfuric acid

• Hydrochloric acid

In a buffer solution, what happens when a small amount of acid is added?

• The pH increases significantly

• The pH decreases significantly

• The pH remains relatively stable

• The solution becomes neutral

Which of the following is an example of a buffer solution?

• Pure water

• Vinegar

• Blood

• Saltwater