Unit 10 Acid/Base

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.

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3
• 9
• 7
• 5

Many cleaning solutions are bases. Which of the following is a property of most bases?

• feels slippery
• white color
• can only be liquid
• tastes sour

Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.

• Acids; pH less than 7
• Acids; pH greater than 7
• Bases; pH greater than 7
• Bases; pH less than 7

Tags

CCSS.RI.11-12.4

CCSS.RI.7.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RI.9-10.4

Tastes bitter.

• Acids
• Bases
• Salts
• All

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

Tags

NGSS.MS-PS1-2

Which type of ion does a base produce when it is dissolved in water?

• oxide
• oxygen
• hydrogen
• hydroxide

Tags

NGSS.MS-PS1-2

A hydrogen ion, H⁺, is the same as a(n):

• neutron
• electron
• proton
• hydroxide ion

Tags

NGSS.MS-PS1-1

A compound that changes color when it is in contact with an acid or base is called______________

• Acid
• Base 
• Neutral
• Indicator

Tags

NGSS.MS-PS1-2

On the pH scale what numbers are bases?

• 8-14
• 0-7
• 7
• 1