Acids, Bases, and pH Scale Questions

Which of the following is a difference between acids and bases?

• Acids are corrosive and bases are not.

• Acids have a pH less than 7 and bases have a pH greater than 7.

• Acids are able to conduct electricity and bases are not.

• Acids have a bitter taste and bases have a sour taste.

Which of the following is a characteristic of a base?

• Turns blue litmus paper red.

• Turns red litmus paper blue.

• Has a sour taste.

• Has a pH lower than 7.

A mystery solution is more acidic than an indigestion tablet, but more basic than milk. Using the pH scale above, which of the following could possibly be the mystery solution?

• Coffee

• Blood

• Drain cleaner

• Lemon juice

Tags

NGSS.MS-PS1-2

Which of the following correctly identifies the strongest acid and the strongest base on the pH scale above?

• Acid – milk; Base – blood

• Acid – battery acid; Base – drain cleaner

• Acid – drain cleaner; Base – battery acid

• Acid – blood; Base – milk

Sugar solution does not change the color of either blue or red litmus paper. Therefore, the sugar solution is _________.

Look at the table to the right. Which of the following best describes the pH of milk?

• Slightly basic

• Strongly basic

• Slightly acidic

• Strongly acidic

Explain the steps required in order to test the pH of an unknown solution using litmus paper.

Which of the following is an example of the Law of Conservation of Mass in action?

• Mixing baking soda and vinegar to produce gas, water, and a salt

• Spraying air freshener to make the room smell better

• Taking a bite of a piece of pizza

• Fertilizing a garden

Tags

NGSS.MS-PS1-5

A chemical equation contains a different amount of atoms of specific elements on the reactants and products sides. This chemical equation would be considered to be which of the following?

• Balanced

• Unbalanced

• Equal

• Conserved

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

According to the Law of Conservation of Mass, during a chemical reaction atoms are –

• created.

• destroyed.

• unchanged.

• rearranged into new substances.

Tags

NGSS.MS-PS1-5