Acids and Bases

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3

• 7

• 9

• 5

pH is the measure of the concentration of ______.

• Acids

• H+ ion

• OH- ion

• Base

If a solution is basic which ion will be more present?

• H+

• K+

• OH-

• H-

Weaker bases have a pH closer to...

• 8

• 14

• 0

• 4

What is the pH range of an acid?

• 4-6

• 1-7

• 1-6

• 8-14

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

Which of the following pH values would be the weakest acid?

• 1

• 3

• 5

• 6

Which of the following pH values would be the strongest acid?

• 1

• 3

• 4

• 6

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