Acid-Base Chemistry Quiz

Why is water considered amphoteric?

• It only acts as a base.

• It can act as both an acid and a base.

• It can only donate protons.

• It is always neutral.

Which of the following best describes the role of an acid in a Bronsted-Lowry reaction?

• It gains an electron.

• It donates a proton.

• It accepts a proton.

• It remains unchanged.

Which of the following is an example of a useful acid-base reaction in everyday life?

• The reaction between stomach acid (HCl) and antacids to relieve heartburn

• The rusting of iron in the presence of oxygen

• The melting of ice into water

• The boiling of water to produce steam

What happens to a Bronsted-Lowry acid after it donates a proton?

• It disappears completely

• It turns into a stronger acid

• It becomes a conjugate base

• It remains unchanged

Which of the following is an example of an amphoteric substance?

• HCl

• NH₃

• NaOH

• H₂O

In a Bronsted-Lowry acid-base reaction, acids and bases always stay the same and do not form conjugate pairs.

• True

• False

Water (H₂O) can act as both an acid and a base depending on the reaction.

• True

• False

A conjugate base is formed when a base gains a proton.

• True

• False

HF + H₂O → F⁻ + H₃O⁺

Identify the Bronsted Acid

• HF

• H₂O

• F⁻

• H₃O⁺

H₃PO₄ + H₂O → H₂PO₄⁻ + H₃O⁺

Identify the Conjugate Base

• H₃PO₄

• H₂O

• H₂PO₄⁻

• H₃O⁺