Unit 12 RETEST - Acids & Bases

Which is the correct set of acid properties:

• sour taste, corrosive, change litmus from red to blue

• sour taste, corrosive, change litmus from blue to red

• sweet taste, slippery, change litmus from blue to red

• sour taste, slippery, change litmus from blue to red

Neutral solutions have a pH of:

• 0

• 1

• 7

• 14

True or false: a neutral solution has equal amounts of H⁺ and OH^-.

• True

• False

Which is true?

• pH of less than 7 is basic; pH of more than 7 is acidic

• pH of less than 7 is acidic; pH of more than 7 is basic

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

• Acid

• Base

• Neither (Neutral)

Tags

NGSS.HS-PS1-1

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. She does the same with a piece of red litmus paper and the paper turns blue.

The substance in the beaker

• is a base.

• has a neutral pH.

• is an acid.

• does not have a pH.

 Which of the following is an acid?

• shampoo
• baking soda
• orange juice
• water

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

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

Tags

NGSS.MS-PS1-2

In a neutralization reaction, what are the products of a reaction between an acid and a base?

• Another acid and base
• Carbon dioxide and a salt
• Water and a salt
• Either two acids or two bases