pH 5

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20

On the pH scale higher numbers indicate

• acids
• bases

The picture below shows the relative concentrations of H+ and OH- in a solution. Is the solution an acid or a base?

• acid

• base

Water has a neutral because

• it has more H+ ions than OH-

• it has more OH- ions than H+

• it does not produce any ions

• it has an equal amount of H+ and OH- in solution

An acid

• is a substance that releases H+ ions when dissolved in water

• is a substance that does not release any ions when dissolved in water

• is a substance that releases OH- when dissolved in water

• releases an equal amount of OH- and H+ ions when dissolved in water

A solution has a pH of 7.0.  What would happen to the pH if H ions were added?

• pH would go up
• pH would go down
• pH would stay the same
• None of these

A solution has a pH of 7.0.  What would happen to the pH if OH ions were added?

• pH would go up
• pH would go down
• pH would stay the same
• None of these

A solution with a pH of 10 is mixed with a solution with a pH of 4.  What would the pH of the mixture most likely be?

• 10
• 4
• 40
• 7