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 chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with iron(III) chloride, which would react with silver nitrate solution like this: FeCl3(aq) + 3 AgNO3(aq) 3 AgCl(s) + Fe(NO,),(aq) The chemist adds 56.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 2.8 mg of silver chloride. Calculate the concentration of iron(III) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits. mg Submit Assignment

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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 chloride
anions in solution will combine with the silver cations to produce bright white silver chloride precipitate.
Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with iron(III) chloride, which would react with silver nitrate solution
like this:
FeCl3(aq) + 3 AgNO3(aq)
3 AgCl(s) +
Fe(NO3),(a9)
The chemist adds 56.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds
she has collected 2.8 mg of silver chloride.
Calculate the concentration of iron(III) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant
digits.
mg
L
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Transcribed Image Text: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 chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with iron(III) chloride, which would react with silver nitrate solution like this: FeCl3(aq) + 3 AgNO3(aq) 3 AgCl(s) + Fe(NO3),(a9) The chemist adds 56.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 2.8 mg of silver chloride. Calculate the concentration of iron(III) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits. mg L Submit Assignment Continue Accessibility Privacy O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use 888 %23 5 6 2 3 E R. G H. D
A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration of 25.6 g·L
-1
.The geochemist also measures the
concentration of salt in several nearby non-isolated lakes, and finds an average concentration of 2.56 g·L '.
-1
Assuming the salt concentration in Lake Parsons before it became isolated was equal to the average salt concentration in nearby non-isolated lakes, calculate
the percentage of Lake Parsons which has evaporated since it became isolated.
Be sure your answer has the correct number of significant digits.
Submit Assignmer
Continue
O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Accessibile
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esc
24
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8
6
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RI
Transcribed Image Text:A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration of 25.6 g·L -1 .The geochemist also measures the concentration of salt in several nearby non-isolated lakes, and finds an average concentration of 2.56 g·L '. -1 Assuming the salt concentration in Lake Parsons before it became isolated was equal to the average salt concentration in nearby non-isolated lakes, calculate the percentage of Lake Parsons which has evaporated since it became isolated. Be sure your answer has the correct number of significant digits. Submit Assignmer Continue O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Accessibile 888 F3 esc 24 4 %23 8 6 2 3 RI
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