pH Acids and Bases

If a substance has a pH of 7, it would be best describe as a _______ substance.

• basic

• neutral

• acidic and a basic

• acidic

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic

• slightly acidic

• strongly basic

• slightly basic

Tags

NGSS.HS-LS1-3

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

• Acid

• Base

• Neither (Neutral)

Which one of these would be considered the weakest base?

• 8

• 7.8

• 11.6

• 14

Milk is a very weak acid. What might its pH value be?

• 6.5

• 7.8

• 4.2

• 12.2

Tags

NGSS.MS-PS1-2

Pure water has a pH of 7. This is considered to be:

• Neutral

• Acidic

• Basic

• None of the above

When blue litmus paper turns red...

• you are testing a base

• you are testing a neutral

• you are testing an acid

A substance tests with a pH of 12.5 is...

• slightly basic

• highly acidic

• slightly acidic

• highly basic

A pH of 11 is...

• highly acidic

• slightly acidic

• highly basic

• slightly basic

What pH is most likely to turn blue litmus paper red?

• 8

• 10

• 4

• 14