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Science · Chemistry
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One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chioride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with copper(i1) chioride, which would react with siliver nitrate solution like this: CuCI (aa) 2 AgNO,(aa)-2AgcI) Cu(NO,),() The chemist adds 37.0 mM silver nitrate solution to the sample until siver chioride stops forming. finds she has collected 3.3 mg of silver chloride Calculate the concentration of co She then washes, dries, and weighs the precipitate. She the concentration of coppertul) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits IP
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