WRQ: Acids and Bases

Bases have a pH of

• 7

• Less than 7

• More than 7

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

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

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.

Which is the stronger acid?

• pH 1
• pH 4
• pH 8
• pH 13

Turns litmus blue.

• Acids
• Bases
• Salts
• All

Turns litmus red

• Acids
• Bases
• All

Which has a pH above 7?

• Acid
• Base

Which has a pH below 7?

• Acid
• Base

When put into a basic solution, red litmus paper ________.

• stays red
• turns blue
• turns magenta
• turns violet