Acid and bases

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

• strongly acidic
• strongly basic
• slightly basic

Isla was doing a chemistry experiment and she came across Zn(OH)₂. She asked Oliver, is this an example of a...

• acid

• base

• salt

H₃PO₄ is an example of a ...

• acid

• base

• salt

If a solution has a pH of 1.5, then litmus would turn

• red

• purple

• blue

Match

• Acid

• OH-

• Base

• NaCl

• Salt

• H+

Tags

NGSS.MS-PS1-5

The pH of 4 solutions were measure in a lab. Which of the solutions is the most basic (alkaline)?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

Rohan was doing a science experiment. He had a red litmus paper and an acid. What would the acid do to Rohan's red litmus paper?

• Turn it Red 

• Turn it Blue

• Turn it Yellow

Elijah and Benjamin are doing a science experiment. They have a piece of red litmus paper. What would happen if they introduce the paper to a base?

• Turn it Red 

• Turn it Blue

• Turn it Yellow

• Turn it Green

Have a bitter taste

• acid
• base
• neither
• both

Ava was doing a science experiment in her school lab. She touched a substance and it felt slippery. What could be the nature of the substance?

• acid

• base

• neither

• both