pH practice Forman 2023

What is the definition of an acid?

• A chemical substance that donates protons or hydrogen ions and has a pH value less than 7.

• A chemical substance that accepts protons or hydrogen ions and has a pH value less than 7.

• A chemical substance that donates electrons and has a pH value greater than 7.

• A chemical substance that has a pH value of exactly 7.

What is the definition of a base?

• A substance that donates OH- ions to a solution and has a value above 7 on the pH scale

• A substance that donates OH- ions to a solution and has a value below 7 on the pH scale

• A substance that donates H+ ions to a solution and has a value above 7 on the pH scale

• A substance that donates OH- AND H+ ions to a solution and has a value of 7 on the pH scale

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

• 7 to 14

• 0 to 14

• 8 to 14

• 0 to 6.9

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

• 8 to 14

• 6 to 12

• 1 to 6

• 0 to 7

What is the pH of a neutral substance?

• 1

• 10

• 14

• 7

Which of these is the STRONGEST acid?

• 3

• 1

• 5

• 10

Describe a substance with a pH of 10:

• basic

• pH of 10 is not possible

• neutral

• acidic

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

• The pH becomes neutral.

• The pH stays the same.

• The pH increases.

• The pH decreases.

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

• The pH of the substance decreases.

• The pH of the substance remains the same.

• The pH of the substance increases.

• The pH of the substance becomes neutral.

What is the pH of freshly distilled water?

• 7

• 6

• 10

• 8