pH and Buffer Dynamics in Medical Biochemistry

The video tutorial covers the concepts of pH and buffers in medical biochemistry. It explains the pH scale, the relationship between hydrogen ion concentration and acidity, and the role of acids and bases in biological reactions. The tutorial also introduces the dissociation constant and pKa, highlighting their significance in chemical equilibrium. Additionally, it discusses the importance of buffers in maintaining pH stability in biological systems, focusing on bicarbonate and acetate buffers.

What does a pH value less than 7 indicate about a solution?

• It is neutral.

• It is acidic.

• It is basic.

• It is alkaline.

Which of the following is a characteristic of a strong acid?

• It completely dissociates in solution.

• It partially dissociates in solution.

• It only dissociates in the presence of a base.

• It does not dissociate in solution.

What is the role of a base in a chemical reaction?

• To accept protons.

• To accept electrons.

• To donate electrons.

• To donate protons.

What does the Henderson-Hasselbalch equation relate to?

• The dissociation of strong acids.

• The pH and pKa of a solution.

• The concentration of water in a solution.

• The temperature of a solution.

At what point does the pH equal the pKa of an acid?

• When the acid is fully ionized.

• When the acid is half ionized.

• When the acid is not ionized.

• When the acid is completely dissociated.

What is the normal pH range of plasma?

• 7.38 to 7.42

• 7.0 to 7.6

• 7.5 to 8.0

• 6.8 to 7.2

What is the primary function of a buffer solution?

• To decrease the basicity of a solution.

• To increase the acidity of a solution.

• To resist changes in pH when acids or bases are added.

• To change the pH of a solution.

Which of the following is a component of the bicarbonate buffer system?

• CH3COOH

• HCl

• NaOH

• H2CO3

How does the ratio of base to acid affect the pH of a buffer?

• The pH remains constant regardless of the ratio.

• The pH increases as the ratio increases.

• The pH is unaffected by the ratio.

• The pH decreases as the ratio increases.

What happens to the pH value if the pKa value is lower?

• The pH value increases.

• The pH value decreases.

• The pH value remains the same.

• The pH value becomes neutral.