Unit 4: Acids, Bases and Solutions

Which of these substances is acidic?

• tap water
• lemon
• ammonia
• baking soda

What is the most likely pH of a tube of toothpaste?

• 3

• 5

• 7

• 9

What might happen if you mixed a strong acid with an equally strong base?

• You would see an explosive chemical reaction.
• The acid would destroy the base.
• The base would destroy the acid.
• You'd wind up with a pH-neutral substance.

An extremely strong base would have a pH of:

• 1
• 7
• 9
• 14

Healthy environments for life have a pH closest to:

• 1
• 3
• 7
• 10

Which of the following substances is basic?

• soda
• lemon juice
• soap
• vinegar

What substance would do the best job of cleaning pots and pans?

• A substance with a pH of 7

• A substance with a pH of 2

• A substance with a pH of 4

• A substance with a pH of 8

What is a property of bases?

• Slippery touch
• Sour taste
• Ability to dissolve metal
• Ability to form hydronium ions

How do acidic solutions taste?

• Delicious

• Sweet

• Bitter

• Sour

Which of the following substances is basic?

• Apple juice
• Ginger ale
• Baking soda
• Distilled water