Acids and Bases

Soap is a weak base.  What is true about the taste of bases?

• they taste sour
• they taste sweet
• they taste bitter
• they taste salty

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

The pH of vinegar is 2.5.  Vinegar is a _____________.

• strong acid
• strong base
• weak base
• weak acid

Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is.  Which of these pH values would be a strong acid?

• 2
• 6
• 9
• 13

What is the pH of water?

• 0
• 4
• 7
• 14

What does a pH of 1 indicate about a liquid?

• it is a very strong base
• it is a weak base 
• it is a weak acid
• it is a strong acid

Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.

• purple
• red
• blue
• pink

What is the pH of a neutral substance?

• 0
• 5
• 7
• 10

Which of these pH values would indicate that a solution is a weak base?

• 4
• 5.6
• 8
• 13

The pH scale is a range from:

• 1-7
• 0-14
• 1-14
• 1-20