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 250. mL sample of groundwater known to be contaminated with copper(II) chloride, which would react with silver nitrate solution like this: CuCl₂(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Cu(NO3)₂(aq) C The chemist adds 90.0 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 6.0 mg of silver chloride. olla Calculate the concentration of copper(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. mg L X S 00

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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 250. mL sample of groundwater known to be contaminated with copper(II) chloride, which would react with silver nitrate
solution like this:
CuCl₂(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Cu(NO3)₂(aq)
C
The chemist adds 90.0 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 6.0 mg of silver chloride.
olla
Calculate the concentration of copper(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits.
Ar
mg
x10
L
x 5
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Explnation
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1
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80
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5
A
FS
A
6
F6
&
7
90
Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
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F7
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F10
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Transcribed Image Text:esc 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 250. mL sample of groundwater known to be contaminated with copper(II) chloride, which would react with silver nitrate solution like this: CuCl₂(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Cu(NO3)₂(aq) C The chemist adds 90.0 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 6.0 mg of silver chloride. olla Calculate the concentration of copper(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. Ar mg x10 L x 5 ? Explnation :: 1 FI 2 Check F2 # 3 80 F3 $ 4 OOD 000 F4 % 5 A FS A 6 F6 & 7 90 Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility AA DD F7 FB F10 F11 $12 * 8 9 F9 ) 0 =
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