AP Chemistry - Acids and Bases and pHs, oh my!

A(n) ______ is a substance with a pH less than 7.

• acid

• alkaline

• base

• buffer

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3
• 9
• 7
• 5

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic
• slightly acidic
• strongly basic
• slightly basic

Tags

NGSS.MS-PS1-2

Which of the following are the conjugate bases of HSO₄^–, CH₃OH, and H₃O⁺, respectively?

• SO₄^2–, CH₂OH^–, and OH^–

• CH₃O^–, SO₄^2–, and H₂O

• SO₄^2–, CH₃O^–, and H₂O

• SO₄^2–, CH₂OH^–, and H₂O

Which molecule is acting as a base in the following reaction?

OH^– + NH₄⁺ → H₂O + NH₃

• OH^–

• NH₄⁺

• H₂O

• NH₃

Which pH would correspond to the weakest base?

• 8

• 14

• 7.8

• 11.6

Which of the following compounds is a strong acid?

I. HClO₄ (aq)

II. H₂SO₄ (aq)

III. HNO₃ (aq)

• I only

• II only

• II and III only

• I, II, and III

Which of the following is not a strong base?

• Ca(OH)₂

• Fe(OH)₃

• KOH

• NaOH

What is the pH of a solution that has an [H⁺] of 2.5 × 10^–5?

• 4.60

• 5.0

• 2.5

• 7

What is the [H⁺] if the pH is 4.0?

• 1.0 × 10^–10 M

• 1.0 × 10^–4 M

• 1.0 × 10^–14 M

• 1.0 × 10^–7 M