Buffer

The pH of the body fluids is stabilised by buffer systems, which of the following is the most effective buffer system at physiological pH?

• Protein Buffer

• Bicarbonate buffer

• Heemoglobin buffer

• Phosphate buffer

Tags

NGSS.HS-LS1-3

What is normal ratio of bicarbonate buffer in blood?

• 10:1

• 20:2

• 20:1

• 1:20

————- is known as the alkali reserve of blood.

Why do cells need a buffer system?

• Chemical processes in the cell are sensitive to the concentration of H⁺ and OH^-

• Cells do not have a buffer system

• Cells need acids and bases to survive

• The pH range of cells can withstand large changes

Which of the following is a common buffer system used in laboratory experiments?

• Acetic acid and sodium acetate

• Hydrochloric acid and sodium chloride

• Sulfuric acid and sodium sulfate

• Nitric acid and sodium nitrate

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

• To change the color of the solution

• To maintain a stable pH

• To increase the temperature

• To decrease the concentration of solutes

In the context of buffers, what does the term 'buffer capacity' refer to?

• The ability of a buffer to resist changes in pH

• The volume of the buffer solution

• The concentration of the buffer components

• The temperature at which the buffer operates

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

• Hydrochloric acid and sodium hydroxide

• Ammonia and ammonium chloride

• Sulfuric acid and sodium sulfate

• Nitric acid and potassium nitrate

How does a buffer solution resist changes in pH upon the addition of an acid?

• By neutralizing the added acid

• By increasing the temperature

• By diluting the solution

• By changing the color of the solution

What is the role of a buffer in biological systems?

• To speed up chemical reactions

• To maintain a constant pH

• To provide nutrients

• To act as a solvent

Tags

NGSS.HS-LS1-3