Acids and Bases

Ammonia has a pH of 12.  Ammonia is __________.

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

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

Explain what happens when a strong acid and a strong base are poured into the same container.

• they form separate layers
• they mix physically but not chemically
• they break apart into separate elements
• they react chemically to form a salt

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

What does the pH scale measure?

• the concentration of acids and bases
• the malleability of a metal
• the temperature of the water in a swimming pool
• the amount of phosphorus in a compound

Compounds form when _______________.

• atoms of one element bond together
• atoms of two or more elements bond together
• molecules of one element are mixed together
• molecules of two or more elements are mixed together

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

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

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

Which statement is true when acids and bases are mixed together?

• acids become stronger
• bases become stronger
• there is no change
• they neutralize each other

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
• 5

• 9
• 13