What distinguishes weak acids from strong acids?

• Weak acids only partially dissociate in water

• Weak acids have a higher pH than strong acids

• Weak acids completely dissociate in water

• Weak acids have a lower concentration of H+ ions

What is the main function of a buffer solution?

• To increase the pH of a solution

• To neutralize all acids and bases in a solution

• To decrease the pH of a solution

• To resist changes in pH when an acid or base is added

Which components make up an acidic buffer solution?

• A strong acid and a weak base

• A weak acid and a strong base

• A weak acid and its conjugate base

• A strong acid and its conjugate base

How can the pH of an acidic buffer solution be calculated?

• By using the concentration of the conjugate base

• By using the concentration of the hydronium ions

• By using the concentration of the strong acid

• By using the concentration of the weak acid

What is the purpose of Le Chatelier's principle in acid-base equilibria?

• To determine the color change of indicators

• To predict the effect of stress on equilibrium systems

• To calculate the pH of a solution

• To measure the concentration of ions in a solution

In what fields are acidic buffer solutions commonly used?

• Geology and astronomy

• Biology and chemistry

• Literature and history

• Physics and mathematics

What is the primary characteristic of a weak acid?

• It reacts vigorously with metals

• It only partially dissociates in water

• It has a high pH value

• It completely dissociates in water

How do buffer solutions help in maintaining a relatively constant pH?

• By neutralizing added acids or bases

• By releasing excess H+ ions

• By increasing the temperature of the solution

• By absorbing excess OH- ions

What is the equilibrium constant used to describe the strength of a weak acid?

• Kc

• Kb

• Kw

• Ka

Which theory defines acids as electron pair acceptors and bases as electron pair donors?

• Lewis theory

• Dalton's theory

• Bronsted-Lowry theory

• Arrhenius theory