Acids and Bases

A substance that changes color in the presence of an acid or base

• indicator

• inhibitor

• catalyst

• salt

What primarily determines the pH of a solution?

• solubility of a solute
• Hydrogen ion (H⁺) concentration
• temperature of the solution

H₃PO₄

• acid
• base
• none

NaOH

• base
• acid
• both

Solution with a high pH.  Contains a lot of hydroxide ions.  

• Acidic
• Basic
• Neutral

The table below shows the pH of several solutions. Which solution has the greatest concentration of H⁺ ions?

• vinegar
• milk
• water
• bleach

This indicates a base:

• pH > 7
• pH < 7
• pH = 7
• pH=0

The pH scale measures...

• ...the strength of an acid.
• ...the strength of hydrogen ions.
• ...the concentration of hydrogen ions.
• ...the concentration of an acid

A solution with a pH of 7 is________

• increasing
• neutral
• decreasing
• apple juice

Which is the stronger acid?

• pH 1
• pH 4
• pH 8
• pH 13