
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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By controlling the pH of an aqueous solution it is possible to control the formation of a precipitate (the
solid form) for a slightly soluble ionic compounds. As an example, consider an aqueous solution with
[Zn2+] = 2.3 x 10^-4 M. Note that the solubility product for zinc hydroxide (Zn(OH)2) is Ksp = 4.1 x 10^-17.
a) At what value for pH will Zn(OH)2 solid first form?
b) What percent of the initial concentration of Zn2+ ion will have formed solid at pH = 9.00?
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