Quiz No. 5 - Acids, Bases and Salts

According to the Arrhenius definition, a base increases the concentration of hydroxide ions (OH⁻) in water, while an acid increases the concentration of hydrogen ions (H⁺).

• True

• False

A Brønsted-Lowry acid is a substance that accepts protons (H⁺), while a Brønsted-Lowry base donates protons.

• True

• False

Hydrochloric acid (HCl) is a monoprotic acid because it can donate only one proton per molecule.

• True

• False

A diprotic acid, like sulfuric acid (H₂SO₄), can only release both protons in a single dissociation step.

• True

• False

In a conjugate acid-base pair, the conjugate acid is always stronger than its corresponding base.

• True

• False

A buffer solution resists changes in pH by neutralizing added acids or bases, typically consisting of a weak acid and its conjugate base.

• True

• False

Titration is a technique used to determine the concentration of an unknown solution by reacting it with a solution of known concentration until the reaction reaches its equivalence point.

• True

• False

A triprotic acid, like phosphoric acid (H₃PO₄), has three ionizable hydrogen atoms and can donate three protons in sequential steps.

• True

• False

The pH of a buffer solution depends on the concentration of the weak acid and its conjugate base, not on the strength of the acid or base.

• True

• False

The endpoint in a titration is reached when the pH of the solution is exactly 7, indicating a neutral solution.

• True

• False