Acids and Bases 8.6D

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

When an acid is dissolved in water, it turns red litmus paper blue.

• True

• False

Which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct

Which of the following is a property of a base?

• bitter taste

• reacts with metals

• salty

• sour taste

All bases have a sour taste.

• True

• False

Which of the following pH values represents a base?

• 2.1

• 4.6

• 6.8

• 8.1

Which of the following is the strongest base?

• oven cleaner - 13.5

• lemon juice - 2.5

• soap - 10

• blood - 7.4

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

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker

• is a base.
• has a neutral pH.
  
• is an acid.
• does not have a pH.

When using pH paper, the pH of a solution can be determined by looking at the _______ of the paper.

• texture
• color
• length
• mass