Chapter 19 Acid Base Theories

According to Brønsted-Lowry acid base theory, an acid ___.

• is a proton donor

• is a proton acceptor

• produces H⁺ when added to water

• turns phenolphthalein pink

According to Arrhenius acid-base theory, an acid ___.

• is an H⁺ acceptor

• is a H⁺ donor

• is a substance that produces H⁺ in water

• turns litmus paper blue

Which reactant in the following equation is acting as a Brønsted-Lowry acid?

• ammonium

• ammonia

• hydroxide

• water

HSO₄^-_(aq) + H₂O_(l) → H₃O⁺_(aq) + SO₄^2-_(aq)

Identify the Brønsted-Lowry acid in the above reaction.

• HSO₄^-

• H₂O

• H₃O⁺

• SO₄^2-

CO₃^2-_(aq) + H₂O_(l) → HCO₃^-_(aq) + OH^-_(aq)

Using the above reaction, which species is the conjugate base?

• CO₃^2-

• H₂O

• HCO₃^-

• OH^-

A substance that remains when a base has accepted an H⁺ ion is a(n)

(a)  

• conjugate acid
• acid
• base
• conjugate base

Choose the conjugate acid of OH-

• HCO₃^-

• OH^-

• CO₃^2-

• H₂O

Choose the conjugate base of HNO₃

• HNO₃

• H₂O

• H₃O⁺

• NO₃^-

True or False: All Arrhenius acids are also Brønsted-Lowry acids.

• True

• False

Which of the following substances is both a Brønsted-Lowry base and an Arrhenius base?

• NH₃(aq)

• LiOH(aq)

• HCl(g)

• HCl(aq)