A Mining Operation Needs to Separate Silver and Copper

question 123

Multiple Choice

A mining operation needs to separate silver and copper. You are hired as a summer intern in a beautiful Colorado mining town, and one of your tasks is 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 precipitating the other. AgCl precipitates first. 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  10 ^{ 2} M
• B)1.57  10 ^{ 4} M
• C)2.23  10 ^{ 2} M
• D)2.23  10 ^{ 4} M
• E)3.72  10 ^{ 3} M

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Definitions:

Economy's Price Level

The general level of prices for goods and services across an economy, indicating the purchasing power of the country's currency.

Labor Force

The total number of people employed and unemployed, available for work, and actively seeking employment.

Cost-Push Inflation

Inflation caused by an increase in the costs of production, such as higher wages or material costs, leading to decreased aggregate supply.

Union Wage

The standard wage rate established through collective bargaining by unions on behalf of their members.