Acid and Bases

 Which of the following is an acid?

• shampoo
• baking soda
• orange juice
• water

Which of the following is a base?

• orange juice
• water
• vinegar
• dishwashing detergent

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

Tags

NGSS.MS-PS1-2

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

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

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker

• is a base.
• has a neutral pH.
  
• is an acid.
• does not have a pH.

When using pH paper, the pH of a solution can be determined by looking at the _______ of the paper.

• texture
• color
• length
• mass

Pure water has a pH of 7. Pure water _______.

• is a base
• is a neutral substance
• could be either an acid or a base
• is an acid

Bleach is a strong base, what is the pH level of bleach?

• 13
• 14
• 1
• 2

Tags

NGSS.MS-PS1-2