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

• Neutral

• Acidic

• Basic

• None of the above

pH 5 is considered to be a:

• weak base

• strong base

• weak acid

• strong acid

When red litmus paper turns blue...

• you are testing an acid

• you are testing a base

• you are testing a neutral

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

The range for acidic substances is ______, and the range for basic substances is _____.

• 0-14 for both

• 0-6.9 - 7.1-14

• 1-8, 10-14

• 1-4, 6-10

Which organ produces an acid to help with digestion?

• pancreas

• stomach

• small intestine

• liver

What does a pH scale do?

• Tells you if a substance is an acid.
• Tells you if a substance is a base.
• Measures the strength or weakness of an acid or base.
• All of these are true.

You can eat or drink an acid.

• True
• False