Understanding Acids, Bases, and the pH Scale

What is the typical range of the pH scale?

• 0 to 14

• 0 to 7

• 7 to 14

• 1 to 10

What happens to the pH of a solution when an acid is added to water?

• The pH decreases

• The pH increases

• The pH remains the same

• The pH becomes neutral

According to the Brønsted–Lowry theory, what is the role of acids in acid-base reactions?

• Proton donors

• Proton acceptors

• Neutralizers

• Salt formers

What is the pH of pure water at 25°C?

• 7.0

• 6.8

• 1.0

• 0.0

What is the function of buffers in biological systems?

• To maintain stable pH levels

• To increase acidity

• To decrease basicity

• To neutralize all reactions