pH Scale, Acids, and Bases

William was conducting a science experiment and found that a certain substance had a pH less than 7. This substance is likely a(n) ______.

• Acid

• Alkaline

• Base

• Buffer

David was conducting a science experiment and found a substance with a pH greater than 7. This substance is a(n) _______.

• Base

• Acid

• Buffer

• Water

Mason and Abigail were conducting a science experiment. They were testing different solutions to see which one releases H+ in solution. Daniel suggested they test the following options. Which one should they choose?

• Base

• Acid

• Buffer

• Water

Tags

NGSS.MS-PS1-2

Maya was conducting a chemistry experiment in her school lab. She noticed that a substance she used was releasing OH- ions into the solution. What type of substance was Maya likely using?

• Acid

• Base

• Neutral

Tags

NGSS.MS-PS1-2

Aiden, Benjamin, and Roman are conducting a science experiment to determine the acidity of various household items. They have narrowed down their options to Baking Soda, Lemon Juice, Black Coffee, and Milk. According to their findings, which item is the most acidic?

• Baking Soda

• Lemon Juice

• Black Coffee

• Milk

Tags

NGSS.MS-PS1-2

Anika, Samuel, and Grace were conducting a science experiment. They had lemon juice, hydrochloric acid, cabbage, and milk. According to the pH range, which substance did they find to be more acidic than lemon juice?

• Hydrochloric acid

• cabbage

• milk

• phosphoric acid

Tags

NGSS.MS-PS1-2

Benjamin, Avery, and Hannah are conducting a science experiment in their school lab. They are using bleach, which is a strong base. Can you tell them what the pH level of bleach is?

• 13

• 7

• 1

• 2

Samuel, Michael, and Henry are in a chemistry lab. Samuel has a strong acid and Michael has an equally strong base. What might happen if they mixed these two substances?

• There would be an explosive chemical reaction.

• The acid Samuel has would destroy the base Michael has.

• The base Michael has would destroy the acid Samuel has.

• They'd wind up with a pH-neutral substance.

Tags

NGSS.MS-PS1-2

During a biology class, Nora, Ethan, and Mason were discussing the pH level of human blood. They learned that it falls between 7.35 and 7.45. Based on this information, how would you best describe human blood?

• strongly acidic

• slightly acidic

• strongly basic

• slightly basic

Tags

NGSS.MS-PS1-2

Abigail was doing a science experiment and she found that soap, which is a base, turned red litmus paper to blue. Aiden told her that bases are sometimes called alkaline. Is Aiden's statement true or false?

• True

• False

Tags

NGSS.MS-PS1-2