Share/Like This Page
Print Instructions

NOTE: Only your test content will print.
To preview this test, click on the File menu and select Print Preview.




See our guide on How To Change Browser Print Settings to customize headers and footers before printing.

Buffer Capacity (College)

Print Test (Only the test content will print)
Name: Date:

Buffer Capacity

Instructions: The following questions require the use of a calculator.

1. 
Which of the following correctly defines a buffer?
  1. A solution that resists changes in pH when an acid is added
  2. A solution that resists changes in pH when a base is added
  3. A solution that allows changes in pH when an acid or a base is added
  4. A solution that resists changes in pH when an acid or a base is added
2. 
Which of the following correctly defines buffering capacity?
  1. The amount of protons a buffer can absorb without a change in pH
  2. The amount of hydroxide ions a buffer can absorb without a change in pH
  3. The amount of protons or hydroxide ions a buffer can absorb without a change in pH
  4. None of the above
3. 
Which of the following equations represents the pH of the buffer?
  1. [math][HA]/[A^-][/math]
  2. 1
  3. [math][HA], only[/math]
  4. [math][A^-]/[HA][/math]
4. 
At which of the following values for the pH of the buffer does optimal buffering occur?
  1. <1
  2. 2
  3. >2
  4. 1
5. 
Which of the following represents a viable buffer?
  1. HCl and its salt
  2. NaOH and its salt
  3. Ammonia and its salt
  4. None of the above
6. 
Which of the following does NOT represent a viable buffer solution?
  1. Citric Acid/Sodium Citrate
  2. Boric Acid/Borax
  3. Carbonic Acid/Sodium Hydrogen Carbonate
  4. None of the above
7. 
Which of the following equations can be used to calculate the concentration of hydrogen ions in a buffer solution?
  1. [math][H^+] = K_a xx [[HA]]/[[A^-]][/math]
  2. [math][H^+] = K_a xx [[A^-]]/[[HA]][/math]
  3. [math][H^+] = {K_a xx [A^-]}/{[A^-] xx[HA]}[/math]
  4. None of the above
8. 
Which of the following correctly represents the equation used to calculate the pH value of the buffer, based on the [math]K_a value[/math]?
  1. [math]pH=pK_a+{log} [[A^-]]/[[HA]][/math]
  2. [math]pH=pK_a-{log} [[A^-]]/[[HA]][/math]
  3. [math]pH=pK_a+{log} [[HA]]/[[A^-]][/math]
  4. [math]pH=pK_a-{log} [[HA]]/[[A^-]][/math]
9. 
If [math]K_b=1.81xx10^-5[/math] and a solution contains 6.00 mol of ammonia and 4.00 mol of ammonium chloride, determine the pH value of this solution.



10. 
If [math]K_a=1.8xx10^-5[/math] for a buffer solution containing acetic acid, [acetate]=1.2 M, and [acetic acid]=0.82 M, determine the pH value of the buffer solution.



Become a Help Teaching Pro subscriber to access premium printables

Unlimited premium printables Unlimited online testing Unlimited custom tests

Learn More About Benefits and Options

You need to be a HelpTeaching.com member to access free printables.
Already a member? Log in for access.    |    Go Back To Previous Page