Acids & Bases Station Lab Review

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue. She does the same with a piece of red litmus paper and the paper turns blue.

The substance in the beaker

• is a base.

• has a neutral pH.

• is an acid.

• does not have a pH.

Which of the following is a base?

• orange juice
• water
• vinegar
• dishwashing detergent

 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

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

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.11-12.4

CCSS.RI.7.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RI.9-10.4

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

Tags

NGSS.MS-PS1-2

Explain what happens when a strong acid and a strong base are poured into the same container.

• they form separate layers
• they mix physically but not chemically
• they break apart into separate elements
• they react chemically to form a salt

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is another name for a base?

• Acid
• Alkaline
• pH