Understanding the pH Scale

What is the pH range for acidic solutions?

• 7 to 10

• 0 to 7

• 7 to 14

• 0 to 14

How does the pH scale measure the acidity or basicity of a solution?

• By the concentration of hydronium and hydroxide ions

• By the color of the solution

• By the temperature of the solution

• By the volume of the solution

What does it mean when a solution has a pH of 7?

• It is highly acidic

• It is highly basic

• It is a strong acid

• It is neutral

How does the concentration of hydronium ions change as you move from pH 7 to pH 0?

• It increases exponentially

• It remains constant

• It decreases linearly

• It decreases exponentially

If a solution has a pH of 3, how many times more hydronium ions does it have compared to a solution with a pH of 5?

• 10 times

• 100 times

• 1,000 times

• 10,000 times

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

• The solution becomes a base

• The pH decreases

• The pH increases

• The pH remains the same

In a solution with a pH of 1, how does the concentration of hydronium ions compare to hydroxide ions?

• There are no ions present

• Hydroxide ions are much higher

• Hydronium ions are much higher

• They are equal

What is the pH of a solution with equal concentrations of hydronium and hydroxide ions?

• 0

• 7

• 14

• 10

How does the concentration of hydroxide ions change as you move from pH 7 to pH 14?

• It decreases exponentially

• It remains constant

• It decreases linearly

• It increases exponentially

What is the pH of a strong base like drain cleaner?

• 1

• 5

• 13

• 7