pH and pOH Worksheet

 

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  1. What is pH?

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  2. How do you solve for pH?

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  3. What do the following values of pH indicate about sol’n acidity/basicity?
    1. pH = 7
    2. pH > 7
    3. pH < 7

     

  4. What are the rules of significant figures when solving for pH?

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  5. If [H+] = 1.0 x 10-7 M at 25oC, what is the pH?

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  6. What is pOH?

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  7. How do you solve for pOH?

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  8. How do pH and pOH relate?

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  9. What do the following values of pOH indicate about sol’n acidity/basicity?
    1. pOH = 7
    2. pOH > 7.
    3. pOH < 7

     

  10. Calculate the pH for a 1.08M sol’n of HNO3.

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  11. Calculate the pH for a 1.00 M sol’n of HF.   (Ka = 7.2 x 10-4)

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  12. A 10.0 mL sample of HCl has a pH = 2.000.  What volume of water must be added to change pH to 4.000? 

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  13. Calculate the pH of a 5.0 X 10-4 M NaOH sol’n.

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  14. Calculate the mass of HONH2 required to dissolve in enough water to make 250.0 mL of sol’n having a pH = 10.00  (Kb = 1.1 x 10-8)

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  15. The pH of a 1.00 x 10-2 M solution of HOCN is 2.77 at 25oC.  Calculate Ka of HOCN from this result.

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  16. Calculate the pH of a 0.30M C2H5NH2 solution.  (Kb = 5.6 x 10-4)

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