
Buffers
Quiz
•
Chemistry
•
9th - 12th Grade
•
Medium
Standards-aligned
Jennifer Lizzi
Used 12+ times
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8 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
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 added
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
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
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
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
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
When making a buffer of pH = 5, acids with the following Ka values are available. Which would be the best acid to use?
1.8 x 10-5
1.8 x 10-8
4.9 x 10-10
3.0 x 10-8
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A buffer has a pH of 4.85 and contains formic acid and potassium formate. What can you conclude about the concentrations of the components of the buffer? The Ka of formic acid is 1.8 x 10-4.
Formic acid > Potassium formate
Formic acid < Potassium formate
Formic acid = Potassium formate
More information is needed to determine the relative concentrations
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the pH of a buffer that is 0.08 M NaA and 0.1 HA. The Ka of HA = 1.0 x 10-4.
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Suppose you have a solution of 0.3 M HBrO and 0.3 M BrO. You add a small amount of NaOH to this buffer solution. What is the reaction that takes place?
H+ + BrO- --> HBrO
OH- + H+ --> H2O
OH- + HBrO --> H2O + BrO-
OH- + BrO- --> O-2 + HBrO
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