Understanding pH and Its Importance

Who introduced the term pH?

• Isaac Newton

• Søren Sørensen

• Marie Curie

• Albert Einstein

What does the 'H' in pH stand for?

• Helium

• Hydrogen

• Heat

• Helix

How is pH mathematically defined?

• The negative of the base 10 logarithm of hydrogen ion concentration

• The square root of hydrogen ion concentration

• The positive logarithm of hydrogen ion concentration

• The multiplication of hydrogen ion concentration by 10

What is the water dissociation constant (Kw) equal to?

• 1.0 x 10^-7

• 1.0 x 10^-14

• 1.0 x 10^-10

• 1.0 x 10^-4

What is the pH of pure water?

• 0

• 14

• 10

• 7

What happens to the pH when the concentration of hydrogen ions increases?

• pH remains constant

• pH decreases

• pH becomes neutral

• pH increases

What does a pH below 7 indicate?

• Neutral solution

• Basic solution

• Pure water

• Acidic solution

Which substance is considered a strong acid?

• Sodium hydroxide

• Citric acid

• Hydrochloric acid

• Water

How can the pOH of a solution be calculated?

• Square root of the hydroxide concentration

• Positive log of the hydrogen concentration

• Negative log of the hydroxide concentration

• Multiplication of the hydroxide concentration by 10

What is the relationship between pH and pOH in a solution?

• They are equal to each other

• Their difference is 7

• Their sum is 14

• Their product is 14