Acids, Bases, pH

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

• basic

• neutral

• acidic and a basic

• acidic

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

• Acid

• Base

• Neither (Neutral)

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

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

pH 5 is considered to be a:

• weak base

• strong base

• weak acid

• strong acid

When blue litmus paper turns red...

• you are testing a base

• you are testing a neutral

• you are testing an acid

Which of the following is MOST acidic?

• 13

• 4

• 2

• 10

Is there is a substance that tests at pH 8.4, which is the best description?

• It is slightly acidic

• It is slightly basic

• It is highly acidic

• It is highly basic

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

• slightly basic

• highly acidic

• slightly acidic

• highly basic