The solubility products of Fe(OH)3 and Ni(OH)2 are about 10-36 and 6 × 10-18, respectively. Find the approximate pH range suitable for the separation of Fe3+ and Ni2+by precipitation of Fe(OH)3 from a solution initially 0.01 M in each ion, as follows: (a) Calculate the lowest pH at which all but 0.1% of the Fe3+ will be precipitated as Fe(OH)3; (b) calculate the highest pH possible without precipitation of Ni(OH)2.
The solubility products of Fe(OH)3 and Ni(OH)2 are about 10-36 and 6 × 10-18, respectively. Find the approximate pH range suitable for the separation of Fe3+ and Ni2+by precipitation of Fe(OH)3 from a solution initially 0.01 M in each ion, as follows: (a) Calculate the lowest pH at which all but 0.1% of the Fe3+ will be precipitated as Fe(OH)3; (b) calculate the highest pH possible without precipitation of Ni(OH)2.
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter14: Chemical Equilibrium
Section: Chapter Questions
Problem 14.98QE
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The solubility products of Fe(OH)3 and Ni(OH)2 are about 10-36 and 6 × 10-18, respectively. Find the approximate pH range suitable for the separation of Fe3+ and Ni2+by precipitation of Fe(OH)3 from a solution initially 0.01 M in each ion, as follows: (a) Calculate the lowest pH at which all but 0.1% of the Fe3+ will be precipitated as Fe(OH)3; (b) calculate the highest pH possible without precipitation of Ni(OH)2.
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