A solution consists of 0.050 M Mg2+(aq) and Cu2+(aq).Which ion precipitates first as OH-(aq) is added? Whatconcentration of OH-(aq) is necessary to begin the precipitationof each cation? [Ksp = 1.8 x 10-11 for Mg(OH)2, andKsp = 4.8 x 10-20 for Cu(OH)2.]

Chemistry & Chemical Reactivity
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Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
Section: Chapter Questions
Problem 104IL: You will often work with salts of Fe3+, Pb2+, and Al3+ in the laboratory. (All are found in nature,...
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A solution consists of 0.050 M Mg2+(aq) and Cu2+(aq).
Which ion precipitates first as OH-(aq) is added? What
concentration of OH-(aq) is necessary to begin the precipitation
of each cation? [Ksp = 1.8 x 10-11 for Mg(OH)2, and
Ksp = 4.8 x 10-20 for Cu(OH)2.]

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