Acids and Bases

Which term describes an acid according to one acid-base theory?

• H⁺ acceptor

• H⁺ donor

• H₂ acceptor

• H₂ donor

According to one acid-base theory, a base is an

• H₂ acceptor

• H₂ donor

• H⁺ acceptor

• H⁺ donor

Given the balanced equation representing a reaction:

HCl + H₂O → H₃O⁺ + Cl^–

The water molecule acts as a base because it

• donates an H⁺

• accepts an H⁺

• donates an OH^–

• accepts an OH^–

Which compounds are classified as Arrhenius acids?

• HCl and NaOH

• HNO₃ and NaCl

• NH₃ and H₂CO₃

• HBr and H₂SO₄

Which statement describes one acid-base theory?

• An acid is an H⁺ acceptor, and a base is an H⁺ donor.

• An acid is an H⁺ donor, and a base is an H⁺ acceptor.

• An acid is an H^– acceptor, and a base is an H^– donor.

• An acid is an H^– donor, and a base is an H^– acceptor.

A substance that dissolves in water and produces hydronium ions as the only positive ions in the solution is classified as

• an alcohol

• an acid

• a base

• a salt

Which compounds yield hydrogen ions as the only positive ions in an aqueous solution?

• H₂CO₃ and HC₂H₃O₂

• H₂CO₃ and NaHCO₃

• NH₃ and HC₂H₃O₂

• NH₃ and NaHCO₃

When dissolved in water, an Arrhenius base yields

• hydrogen ions

• hydronium ions

• hydroxide ions

• oxide ions

Given the equation representing a reaction at equilibrium:

NH₃(aq) + H₂O(l) <--> NH₄⁺(aq) + OH^-(aq)

According to one acid-base theory, which pair are the H⁺ donors?

• NH₃(aq) and H₂O(l)

• NH₃(aq) and OH^-(aq)

• NH₄⁺(aq) and H₂O(l)

• NH₄⁺(aq) and OH^-(aq)

Potassium hydroxide is classified as an Arrhenius base because KOH contains

• OH⁻ ions

• O₂⁻ ions

• K⁺ ions

• H⁺ ions