Acids and Bases

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct

If the substance is neutral, what would the pH be?11

• 3

• 5

• 7

• 9

• 11

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

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.

Tags

NGSS.MS-PS1-2

What is the pOH of a solution that has a pH of 2?

• 10
• 12
• 14
• 1

Phenolophalein turns from clear to pink when the pH turns

• acidic

• basic

• saline

• ionic

What completely ionizes in solution?

• Weak acids

• Strong acids

• Strong Salts

• Neutral salts

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker

• is a base.
• has a neutral pH.
  
• is an acid.
• does not have a pH.

For a solution, pH + pOH =

• 7

• 14

• 1.0 x 10^-14

• -log (1.0 x 10 ^-14)