### EPA Method for Testing Chloride Contaminants Using Silver NitrateOne method used by the U.S. Environmental Protection Agency (EPA) to test for chloride contaminants in water involves titration with a silver nitrate solution. During this process, chloride anions in the solution react with the silver cations, forming a bright white silver chloride precipitate.#### Example CalculationConsider an EPA chemist analyzing a 200 mL groundwater sample known to contain tin(II) chloride. In this test, the silver nitrate solution reacts with the tin(II) chloride as follows:\[ \text{SnCl}_2(aq) + 2 \text{AgNO}_3(aq) \rightarrow 2 \text{AgCl}(s) + \text{Sn(NO}_3\text{)}_2(aq) \]The chemist adds a 38.0 mM silver nitrate solution to the sample until no more silver chloride forms. Afterward, she collects, washes, dries, and weighs the precipitate, obtaining 6.1 mg of silver chloride.#### TaskCalculate the concentration of tin(II) chloride in the original groundwater sample. Provide your answer rounded to two significant figures.**Input Field**: - Units: mg/L**Calculator Instructions**: - Use the provided tools to input your answer rounded to two significant digits.

The balanced equation is:Determination of number of moles of AgCl Mass of AgCl collected = 6.1mg Molar mass of AgCl= 143.32g/mol Number of moles= 4.256×10-5mol. Calculating moles of SnCl2 1 mole of SnCl2 reacts to form 2 moles of AgCl. Thus, Calculating the mass of SnCl2 Determination of concentration of SnCl2 Volume, V = 200ml Hence, the concentration of SnCl2 is 20.17 mg/L.

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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 tin(II) chloride, which would react with silver nitrate solution like this: SnCl,(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Sn(NO3),(aq) The chemist adds 38.0 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 6.1 mg of silver chloride. Calculate the concentration of tin(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. mg

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 tin(II) chloride, which would react with silver nitrate solution like this: SnCl,(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Sn(NO3),(aq) The chemist adds 38.0 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 6.1 mg of silver chloride. Calculate the concentration of tin(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. mg

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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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: FeCl,(aq) + 3 AgNO,(aq) 3 AgCl(s) + Fe(NO₂),(ag) The chemist adds 21.0 mM silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he has collected 3.3 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. e -12 D.P C P
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