Acids and Bases

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

What would be considered the weakest base? 

• 8
• 14
• 7.8
• 11.6

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

Pure water has a pH of 7. Pure water _______.

• is a base
• is a neutral substance
• could be either an acid or a base
• is an acid

Acids are found on the pH scale between which numbers?

• 0-7
• 7
• 7-14
• 19-42

Turns litmus red

• Acids
• Bases
• All

What methods can you use to measure the pH of a solution?

• Observing color or clarity
• Measuring mass or volume
• Measuring density or electrical conductivity
• Using acid base-indicators or pH meters

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

Turns litmus blue.

• Acids
• Bases
• Salts
• All

A substance that is 3 on the pH scale would be a(n):

• acid

• base

• neutral

• solute