Starting concentrations of yourmetal ions in your initial solution: [M+]= 4.00 x 10-5 M [M2+]= 2.50 x 10-5 M Using these values, predict which metal will precipitate first, and at what concentration of anion the precipitation will begin. Clearly state the parameters of your particular problem at the beginning. What is M+, what is M2+, what are your concentrations, what are you solving for?
You have a solution containing two metal cations. You want to separate them by slowly and carefully adding a solution of an anion, until one metal cation precipitates as a compound with that anion, leaving the other metal cation still in solution.
Your metal cations (M+ and M2+) and your anion
M+= Cu^+
M^2+= Cd^2+
Anion= S^2-
First Ksp
(M+ w/anion)= 2.5 x 10-48
Second Ksp
(M2+ w/anion)= 1.0 x 10-28
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Starting concentrations of yourmetal ions in your initial solution:
[M+]= 4.00 x 10-5 M
[M2+]= 2.50 x 10-5 M
Using these values, predict which metal will precipitate first, and at what concentration of anion the precipitation will begin.
Clearly state the parameters of your particular problem at the beginning. What is M+, what is M2+, what are your concentrations, what are you solving for?
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