Buffer Solutions Worksheet

 

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  1. What is a buffer solution?

     

     

  2. When solving problems for a buffer solution you can bypass the ICE chart and use the Henderson-Hasselbalch equation instead.   What is the Henderson-Hasselbalch equation?

     

     

  3. Identify the buffer?
    1. HCl and NaClO­4
    2. HClO and LiClO2
    3. HF and KF
    4. CH3NH2 and CH3NH3Cl

       

       

  4. Determine the pH of the following solutions
    1. 1.00 L solution of 1.00M HNO2 and 1.50M NaNO2. 
      (Ka = 4 x 10-4)
    2. 25.0g of NH3  and 40.0g NH4NO3 in 501.0 mL of water. 
      (Ka = 5.6 x 10-10)

       

       

  5. What is buffer capacity?

     

     

  6. Consider:

    0.1 M NaF and 0.1M HF
    1.0M NaF and 1.0M HF
    0.01M NaF and 0.01M HF

    1. Which has the highest pH?
    2. Which has the highest buffer capacity?

       

       

  7. Consider a solution that contains both NH3 and NH4NO3.  If a solution has a pH = 8.5, calculate the ratio  of        


    Ka = 5.6 x 10-10

     

     

  8. What volumes of 0.22M CH3COOH and 0.46M NaCH3COO must be mixed to prepare a 1.00L solution buffered at pH = 5.00?  (Ka = 1.76 x 10-5)

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