Buffer solutions

The video explains the importance of maintaining a specific pH in body fluids and various processes. It introduces buffer solutions, which help resist pH changes, and describes how to prepare them using PKA and PKB values. Examples of buffer solutions, such as acetic acid with sodium acetate and ammonium chloride with ammonium hydroxide, are provided.

Why is it important to maintain a narrow pH range in body fluids?

• To improve skin texture

• To prevent disorders in the body

• To increase blood pressure

• To enhance the taste of food

What is the primary function of a buffer solution?

• To resist changes in pH

• To decrease the viscosity of a solution

• To increase the temperature of a solution

• To change the color of a solution

Which of the following is a key component in preparing a buffer solution?

• The viscosity of the solution

• The PKA of the acid or PKB of the base

• The temperature of the solution

• The color of the solution

What is an example of a buffer solution that maintains a pH around 4.75?

• Hydrochloric acid and sodium chloride

• Acetic acid and sodium acetate

• Sulfuric acid and potassium sulfate

• Ammonium chloride and ammonium hydroxide

Which buffer solution is effective around a pH of 9.25?

• Acetic acid and sodium acetate

• Ammonium chloride and ammonium hydroxide

• Citric acid and sodium citrate

• Phosphoric acid and sodium phosphate