Acids and Bases

Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.

• Acids; pH less than 7
• Acids; pH greater than 7
• Bases; pH greater than 7
• Bases; pH less than 7

Tags

CCSS.RI.4.10

CCSS.RI.5.10

CCSS.RI.3.10

CCSS.RI.6.4

CCSS.RI.7.4

The esophagus is the tube that connects the mouth to the stomach. Heartburn occurs when some of the stomach juices flow backwards up the esophagus. To help relieve heartburn, a person should take medicine that is

• neutral
• basic
• 
  acidic or basic.
  
• acidic

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.
• a stronger acid.
• impossible to tell without testing the pH.
• a stronger base

Tags

NGSS.MS-PS1-2

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

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

A compound that changes color when it is in contact with an acid or base is called______________

• Acid
• Base 
• Neutral
• Indicator

Tags

NGSS.MS-PS1-2

The pH scale measures...

• ...the strength of an acid.
• ...the strength of hydrogen ions.
• ...the concentration of hydrogen ions.
• ...the concentration of an acid

Pollution causes the pH of rain water fall below 6. What is such type of rain called?

• Acid rain
• polluted rain
• low pH rain

Tags

NGSS.MS-ESS2-4