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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

Which of the following chemical formulas is NOT an acid?

• HBr

• HF

• HCl

• LiOH

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

HF is...

• an acid

• a base

• a salt

• an ionic compound

KOH is ...

• an acid

• a base

• a salt

• an ionic compound

Which of the following statements is correct?

• Blue litmus paper turns red when placed in a base.
• Red litmus paper turns blue when placed in a base.
• Blue litmus paper stays blue when placed in an acid.
• Red litmus paper stays red when placed in a base.