pH buffers

Buffer is defined as

• ability to resist pH change

• ability to prevent pH from decreasing

• ability to resist a pH increase

• ability to resist pH change when small amount of acid or base are added

Acidic buffer is made up of

• weak acid and weak base
• weak acid and its conjugate salt
• weak acid and its conjugate base
• strong acid and its conjugate base

Basic buffer is made up of

• weak base and weak acid
• weak base and its conjugate salt
• weak base and its conjugate acid
• strong base and its conjugate acid

Which solution A and B of equal volume and concentration mixed together to form a buffer?

• Nitric acid and potassium hydroxide
• Nitric acid and potassium nitrate
• Propanoic acid and potassium hydroxide
• Propanoic acid and potassium propanoate

Which of the following pair is correct?

• (FeCI₃ - acidic) (Na₂CO₃ - basic)
• (FeCI₃ - neutral) (Na₂CO₃ - basic)
• (FeCI₃ - acidic) (Na₂CO₃ - neutral)
• (FeCI₃ - neutral) (Na₂CO₃ - neutral)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which mixture of strong acid and weak base could produce a buffer solution?

• A

• B

• C

• D

Which will produce an acidic salt?

• A
• B
• C
• D

Which will produce an alkaline salt?

• A
• B
• C
• D

The salt shown below is

• Acidic
• Basic
• Neutral
• None of the above

Tags

NGSS.HS-PS1-3

What kind of acid does not completely dissociate?

• weak
• strong
• ionic
• pH