Understanding the pH Scale and Acids & Bases

What is the pH range of the pH scale?

• 1 to 10

• 0 to 7

• 0 to 14

• 1 to 14

What is the pH of a neutral substance like pure water?

• 0

• 14

• 10

• 7

Which of the following has a pH of around 2?

• Acid rain

• Stomach acid

• Washing up liquid

• Bleach

What is the main advantage of using a pH probe over an indicator?

• It is faster

• It is more accurate

• It is cheaper

• It is more colorful

What ions do acids release in water?

• Hydrogen ions

• Chloride ions

• Sodium ions

• Hydroxide ions

What is a base that dissolves in water called?

• Alkali

• Neutral

• Salt

• Acid

What is produced when an acid reacts with a base?

• Hydrogen gas

• Salt and water

• Carbon dioxide

• Oxygen gas

Which of the following is a common acid?

• Calcium carbonate

• Sodium hydroxide

• Hydrochloric acid

• Ammonia

What color does Universal Indicator turn in a highly acidic solution?

• Green

• Yellow

• Deep red

• Blue

What ions do alkalis form in water?

• Hydrogen ions

• Hydroxide ions

• Sodium ions

• Chloride ions