Acid and Base

The pH of a concentrated acid

• 0

• 7

• 14

• 6

An organic substance that changes color in the presence of an acid or base

• indicator

• inhibitor

• catalyst

• salt

A substance is found to have the following characteristics:

Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water

In what category would the substance be classified?

• acid

• base

• enzyme

• fatty acid

Tastes bitter.

• Acids

• Bases

• Salts

• All

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.

Tags

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.

Tags

DOK Level 2: Skill/Concept

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

• orange juice

• dish soap

• vinegar

• lemons

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

Tastes bitter: (a)  

• acids

• bases

• neutral

• pH paper

Taste sour (a)   .

• acids

• bases

• neutral

• pH scale