Understanding pH and Acidity

What is the pH value for a neutral substance like pure water?

• 0

• 5

• 7

• 14

What element does the 'H' in pH represent?

• Helium

• Hydrogen

• Heat

• Heavy

What does pH tell us about a substance?

• How much it weighs.

• How hot or cold it is.

• How strong its acid or base character is.

• How much light it reflects.

How can water act like both an acid and a base?

• It can change its temperature very quickly.

• Its molecules can both give away and take in protons.

• It can dissolve many different substances.

• It is made of two hydrogen atoms and one oxygen atom.

What is the pH of pure water?

• 0

• 7

• 14

• 1

What color does litmus paper turn when it is in an acidic solution?

• Blue

• Purple

• Pink

• Green

If a solution has a high amount of hydrogen ions (H+), what does this mean for its pH?

• The pH will be high

• The pH will be low

• The pH will be neutral

• The pH cannot be determined

What is the total when you add the pH and pOH of any water-based solution?

• 7

• 10

• 14

• It changes for different solutions