pH Scale in Biology

What does pH stand for?

• potential of hydrogen

• power of hydrogen

• pressure of hydrogen

• percentage of hydrogen

What is the pH range of acids on the pH scale?

• 0 to 14

• 8 to 14

• 7 to 14

• 0 to 6.9

What is the pH range of bases on the pH scale?

• 8 to 14

• 0 to 7

• 1 to 6

• 7.1 to 14

What is the pH of a neutral substance?

• 7

• 1

• 10

• 14

What is the pH of lemon juice?

• 2.0

• 8.0

• 6.0

• 4.0

What is the pH of baking soda?

• 8.3

• 6.7

• 10.2

• 5.5

What happens to the pH of a solution when it becomes more acidic?

• The pH of the solution becomes neutral.

• The pH of the solution remains the same.

• The pH of the solution decreases.

• The pH of the solution increases.

What happens to the pH of a solution when it becomes more basic?

• The pH of the solution remains the same.

• The pH of the solution increases.

• The pH of the solution decreases.

• The pH of the solution becomes neutral.

What is the pH of stomach acid?

• 4 to 6

• 7 to 9

• 10 to 12

• 1 to 3

What is the pH of bleach?

• 1-2

• 7

• 12-13

• 14