Understanding Acids, Bases, and the pH Scale

What does a pH value below 7 indicate about a substance?

• The substance is an acid.

• The substance is neutral.

• The substance is alkaline.

• The substance is a base.

If a substance turns blue litmus paper red, what can be inferred about the substance?

• It is a base.

• It is an acid.

• It is a salt.

• It is neutral.

Which of the following is a characteristic of bases?

• They taste bitter.

• They react with metals.

• They are corrosive.

• They taste sour.

What happens when a strong acid reacts with a strong base?

• They form a stronger acid.

• They form a stronger base.

• They form a neutral solution.

• They form a salt.

What ions are produced when a base is dissolved in water?

• Hydroxide ions (OH-)

• Hydrogen ions (H+)

• Sodium ions (Na+)

• Chloride ions (Cl-)