AM Unit 3 Review

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.

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3
• 9
• 7
• 5

What is the range of pH values in an acidic solution?

• 0-7
• 7-14
• 15-239058204958
• pH = 7

Which is the stronger acid?

• pH 1
• pH 4
• pH 8
• pH 13

Ammonia has a pH of 12.  Ammonia is __________.

• an acid
• a base
• an element
• a metal

When dissolved in water, bases produce:

• acids
• salts
• hydrogen ions
• hydroxide ions

Which of these solutions is an acid?

• Dish Soap: pH of 12
• Tomato Soup: pH of 4
• Baking Soda: pH of 9
• Drain Cleaner: pH of 14

Which of the following is true about acids and bases?

• The lower the pH, the stronger the acid
• the higher the pH, the stronger the acid
• The lower the pH, the more neutral the acid
• The higher the pH, the weaker the base

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

pH is the measure of the concentration of ______.

• Acids

• H+ ion

• OH- ion

• Base