The pH Scale Quiz

What does the pH scale measure?

• The concentration of hydrogen ions in a solution

• The viscosity of a solution

• The temperature of a solution

• The color intensity of a solution

What is the pH of neutral water?

• 10

• 0

• 7

• 14

Match the following substances with their effect on the concentration of hydrogen ions in a solution.

• Increases the concentration of hydrogen ions

• Acid

• Decreases the concentration of hydrogen ions

• Base

• Does not change the concentration of hydrogen ions significantly

• Salt

• Depends on the type, may not change the concentration of hydrogen ions significantly

• Water

What is the role of buffers in human biology?

• To eliminate pH levels

• To maintain pH levels

• To increase pH levels

• To decrease pH levels

What is the pH range of acidic solutions?

• 6 to 7

• 1 to 3

• 7.1 to 14

• 0 to 6.9

Which of the following is a strong acid?

• Vinegar

• Sodium hydroxide

• Seawater

• Hydrochloric acid

What happens to the pH level when a base is added to a solution?

• It remains the same

• It increases

• It fluctuates wildly

• It decreases

What is the pH of human blood?

Mathematical Equivalence

ON

What ion does a base release in water?

• Bicarbonate ion (HCO3-)

• Carbon dioxide (CO2)

• Hydrogen ion (H+)

• Hydroxide ion (OH-)

How often is the lining of the human stomach replaced?

• Every 7-10 days

• Every month

• Every 3-5 days

• Every day