Acids and Bases

Which of the following is a base?

• orange juice
• water
• vinegar
• dishwashing detergent

Litmus paper can be used to determine the _______ of a substance.

• relative volume
• temperature
• relative pH
• chemical formula

Which of the following statements is correct?

• Blue litmus paper turns red when placed in a base.
• Red litmus paper turns blue when placed in a base.
• Blue litmus paper stays blue when placed in an acid.
• Red litmus paper stays red when placed in a base.

Tags

NGSS.MS-PS1-2

 Which of the following is an acid?

• shampoo
• baking soda
• orange juice
• water

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

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

Tags

NGSS.MS-PS1-2

When using pH paper, the pH of a solution can be determined by looking at the _______ of the paper.

• texture
• color
• length
• mass

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