Acid/Base Chemistry Review

Which of the following are acids? Choose all that apply.

• HBr

• LiOH

• HClO

• LiNO2

Which of the following are bases? Select all that apply.

• Ca3(PO4)2

• LiOH

• RbOH

• HNO3

A solution has a pH of 7.2. After the addition of 2.0 ml of HCl, the pH of the solution is 7.1. What is a likely reason for this observation.

• The solution has a strong base to neutralize the acid.

• The solution was already acidic so this is what should happen.

• The solution contains a buffer

• The HCl is a base so the pH would not change much.

What is a base?

• Accepts a proton (H⁺)
• Donates a proton (H⁺)
• The product of donating a proton (H⁺); aka what's left of a molecule after it The product of donating a proton (H⁺); aka what's left of a molecule after it donates a proton
• The product of accepting a proton (H⁺); aka what's formed when the molecule accepts a proton

What is an acid?

• The product of donating a proton (H⁺); aka what's left of a molecule after it donates a proton
• Accepts a proton (H⁺)
• Donates a proton (H⁺)
• The product of accepting a proton (H⁺); aka what's formed when the molecule accepts a proton

Donate protons (H+)

• ACID

• BASE

• NEITHER

Taste Bitter; Litmus paper Blue; Feels Slippery

• Acids

• Bases

• Neutral

Tags

NGSS.MS-PS1-2

Acid + base --> ?

• salt + hydrogen gas + water
• salt + carbon dioxide + water
• salt + water
• salt only

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

turns blue litmus paper red

• acid
• base

Tags

NGSS.MS-PS1-2

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.
The substance in the beaker

• is a base.
• has a neutral pH.
  
• is an acid.
• does not have a pH.