Acids vs Bases

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Milk is a very weak acid. What might its pH value be?

• 6.5

• 7.8

• 4.2

• 12.2

Which of the following pH values represents a base?

• 2.1

• 4.6

• 6.8

• 8.1

The strongest bases have pH values close to

• 0

• 14

• 7

• 5

If the substance is neutral, what would the pH be?11

• 3

• 5

• 7

• 9

• 11

 Which of the following is an acid?

• shampoo
• baking soda
• orange juice
• water

Which of the following substances is basic?

• soda
• lemon juice
• soap
• vinegar

What would happen to blue litmus paper if it came into contact with an acid?

• It would turn red

• It would turn green

• It would stay blue

• It would turn pink

What would happen to red litmus paper when it encounters a base?

• It turns blue

• It stays red

• It turns purple

• It turns green

A substance is found to have the following characteristics:

Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water

In what category would the substance be classified?

• acid

• base

• enzyme

• fatty acid