Acids and Bases and pH Scale

Acids have a ______ pH than Bases

• lower

• higher

• An acid will not have a pH

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20

If the pH of a solution is 7 the solution is said to be

• Acidic
• Basic
• Neutral
• Tasty

Which of these solutions is an acid?

• Dish Soap: pH of 12

• Tomato Soup: pH of 4

• Baking Soda: pH of 9

• Drain Cleaner: pH of 14

Ammonia has a pH of 12. Ammonia is __________.

• an acid

• a base

• an element

• a metal

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

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

• acid

• base

When dissolved in water, bases produce:

• acids
• salts
• hydrogen ions
• hydroxide ions

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

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