Acid-Base Equilibria Quiz

What is the definition of an acid according to the Brønsted-Lowry theory?

• A substance that donates electrons

• A substance that accepts protons

• A substance that donates protons

• A substance that produces hydroxide ions

What is the pH of a neutral solution at 25°C?

• 0

• 7

• 14

• 10

What is the definition of a base according to the Brønsted-Lowry theory?

• A substance that donates protons

• A substance that accepts protons

• A substance that produces hydrogen ions

• A substance that produces hydroxide ions

Which of the following is a strong base?

• Sodium bicarbonate

• Ammonium hydroxide

• Sodium hydroxide

• Calcium carbonate

Which statement about amphoteric substances is true?

• They can only act as acids.

• They can only act as bases.

• They can act as both acids and bases.

• They do not participate in acid-base reactions.

Which of the following statements about pH is true?

• pH = -log[H⁺]

• pH = log[H⁺]

• pH = [H⁺]

• pH = 10^[-H⁺]

What is Kw at 25°C?

• 1.0 × 10⁻¹⁴

• 1.0 × 10⁻¹²

• 1.0 × 10⁻¹⁶

• 1.0 × 10⁻¹³

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

• It partially ionizes in solution.

• It completely ionizes in solution.

• It has a high pKa value.

• It has a low conductivity in solution.

In a reaction between an acid and a base, what is produced?

• Salt and water

• Hydrogen gas and salt

• Acid and base

• Oxide and water

What happens to the equilibrium position when you increase the temperature of an exothermic reaction?

• It shifts to the right (products).

• It shifts to the left (reactants).

• It remains unchanged.

• It shifts randomly.