Buffer Systems and Their Functions

This video tutorial explains buffer systems, their importance in resisting pH changes, and their applications in biological and industrial contexts. It covers the concept of buffer regions during titration, the reactions that occur in buffer systems, and the components required to form a buffer. The tutorial also provides examples of buffer solutions, including those formed with weak acids and bases, and discusses the formation of acidic and basic buffers.

What is the primary function of a buffer system?

• To dissolve salts

• To neutralize all acids

• To increase the pH of a solution

• To resist changes in pH

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

• Strong acid and strong base

• Weak acid and its conjugate base

• Only water

• Only spectator ions

At half equivalence, what is true about the amounts of acid and conjugate base?

• There is no acid present

• They are equivalent

• Conjugate base is double the acid

• Acid is double the conjugate base

What happens when a base is added to a buffer system?

• The acid reacts with the base

• The pH increases drastically

• The conjugate base is destroyed

• The base remains unchanged

Which pair is necessary to form a buffer?

• Strong acid and strong base

• Weak acid and its salt

• Only a strong base

• Only a weak base

What is the role of a salt in a buffer system?

• To increase the acidity

• To provide the conjugate base

• To neutralize the solution

• To act as a solvent

Can a buffer be formed with a strong acid and a weak base?

• No, it forms a neutral solution

• No, it forms a strong acid

• Yes, it forms a basic buffer

• Yes, but only in acidic conditions

What is the conjugate acid of NH3?

• NH3+

• NH4+

• NH2-

• NH2+

Which of the following is a weak base?

• NH3

• HCl

• H2SO4

• NaOH

What happens when a weak base reacts with a strong acid?

• A neutral solution is formed

• The base is completely neutralized

• A buffer with an acidic pH is formed

• A buffer with a basic pH is formed