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Chemistry, 7/e
Raymond Chang, Williams College
Acid-Base Equilibria and Solubility Equilibria

Internet Exercises

buffer solutions, titrations, and solubility equilibria
(http://www.compusmart.ab.ca/plambeck/che/p101/p01171.htm)

  1. Check out what is posted on the areas of buffer solutions, titrations, and solubility equilibria at the same address, http://www.compusmart.ab.ca/plambeck/che/p101/p01171.htm, and answer the questions below.
    1. What are the two criteria for a solution to be identified as a buffer system?
    2. What is the maximum buffer capacity of any acid-base conjugate pair?
    3. What are bystander ions?
    4. Why is it more useful to use a strong acid or base as the titrant instead of a weak acid or base?
    5. What is the equivalence point of a titration?
    6. How does an acid-base indicator work? Why does it change color?
    7. How are Ksp and solubility related?
    8. Suppose the solubility of potassium nitrate is found to be 0.42 g/L. Find the Ksp for this compound.
solubility and precipitation
(http://www.people.virginia.edu/~roa2s/chem_222/solubility_and_precipitation/solubility_an... )

  1. Professor Ralph Allen of the University of Virginia Department of Analytical Chemistry hosts this web site on solubility and precipitation. http://www.people.virginia.edu/~roa2s/chem_222/solubility_and_precipitation/
    solubility_and_precipitation_problem_set_home.html
    1. Use his online tutorial to determine the answers in the six problems presented at this site.
Solubility of Ionic Salts
(http://www.compusmart.ab.ca/plambeck/che/p101/p01171.htm)

  1. Read the introduction to "Solubility of Ionic Salts" at the University of Alberta site, http://www.compusmart.ab.ca/plambeck/che/p101/p01171.htm, and then look at study problem 4
    1. It is important to understand the compound, MgNH4PO4, before you begin your answer. What ions are present in this compound?
    2. Write out the equation for the dissolution of this compound, and the solubility product expression.
    3. Now solve the problem.








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