SCIENCE 7: ACIDS AND BASES

What does the pH scale measure?

• Temperature

• Concentration of ions

• Acidity and basicity

• Volume

If a substance has a pH value of 3, it is considered:

• Neutral

• Basic

• Acidic

• Alkaline

A substance with a pH value of 12 is:

• Acidic

• Neutral

• Basic

• Non-reactive

What is the pH value of a neutral substance?

• 0

• 7

• 14

• 5

Which of the following is a natural pH indicator?

• Methyl orange

• Turmeric

• Bromophenol blue

• Phenolphthalein

A pH value of 6 indicates:

• Strong acid

• Weak acid

• Neutral

• Basic

Which pH indicator turns red in acidic solutions?

• Phenolphthalein

• Methyl orange

• Bromophenol blue

• Thymol blue

If a solution turns blue with bromophenol blue, it is:

• Acidic

• Neutral

• Basic

• Colorless

Which of the following indicators is used to test basic solutions?

• Alizarin yellow

• Red cabbage juice

• Turmeric

• Grape juice

The pH of distilled water is typically:

• 1

• 7

• 14

• 5