A Mining Operation Needs to Separate Silver and Copper $\times$ 10^-2 M
B)1

question 206

Multiple Choice

A mining operation needs to separate silver and copper.You are to determine whether this separation can be accomplished by oxidizing the metals to Ag⁺ and Cu⁺,each one at a concentration of 0.15 M,and then precipitating one as the chloride salt without precipitate the other.What is the concentration of the Ag⁺ remaining in solution when CuCl begins to precipitate? (For AgCl,pK_sp = 9.74.and for CuCl,pK_sp = 6.76.)

• A)1.57 \(\times\) 10^-2 M
• B)1.57 \(\times\) 10^-4 M
• C)2.23 \(\times\) 10^-2 M
• D)2.23 \(\times\) 10^-4 M
• E)3.72 \(\times\) 10^-3 M

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