Acids & Bases

A substance that is 3 on the pH scale would be a(n):

• acid

• base

• neutral

• solute

A substance that changes color when mixed with an acid or base is a(n) ___.

• indicator

• neutralizer

• corrosive

• electricity

What color does litmus paper turn in the presence of an acid?

• blue

• black

• green

• red

A substance that is a 10 on the pH scale would be a(n) ____.

• acid

• neutral

• base

• indicator

Which of the following is a property of both acids and bases?

• They both taste sour.

• They both feel slippery.

• They both conduct electricity.

• They both turn litmus paper the same color.

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DOK Level 2: Skill/Concept

What is the effect of adding an acid to a base?

• The solution becomes more acidic.

• The solution becomes more basic.

• The solution becomes neutral.

• The solution remains unchanged.

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DOK Level 2: Skill/Concept

Which one of the following is an example of a base? (a)  

• orange juice

• dish soap

• vinegar

• lemons

Bases do not react with ​ (a)   or carbonates, taste ​ (b)   , feel ​ (c)   , and turn ​ (d)   litmus paper ​ (e)   .

• metals

• bitter

• slippery

• red

• blue

• sour

• sweet

• dry

Bases, also known as ​ (a)   will turn litmus paper ​ (b)   . This is because they have a pH ​ (c)   . They taste ​ (d)   .

• alkali and OH-

• blue

• above 7

• bitter

• below 7

• H+

• red

• sour

According to the pH scale, which item is more acidic than lemons?

• battery

• vinegar

• milk

• blood