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 iron(II) chloride, which would react with silver nitrate solution like this: FeCl2(aq) + 2AgNO3(aq) → 2AgCl(s) + FeNO32(aq) The chemist adds 54.0mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 3.4mg of silver chloride. Calculate the concentration of iron(II) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits.
FeCl2(aq) + 2AgNO3(aq) ----> 2AgCl(s) +
FeNO32(aq)
mass of precipitate(AgCl) formed = 3.4 mg
No of mole of AgCl formed = 3.4/143.32 = 0.0237 mmole
1 mole AgCl = 1 mole Cl-
No of mole of Cl- present in sample = 0.0237 mmole
1 mole FeCl2 = 2 mole Cl-
No of mole of FeCl2 present in sample = 0.0237*(1/2) = 0.0119 mmole
concentration of FeCl2 in sample = n/v
= 0.0119/250
= 4.76*10^-5 M
One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by...
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) + 2AgNO3(aq) → 2AgCl(s) + CuNO32(aq) The chemist adds 59.0mM silver nitrate...
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 copper(II) chloride, which would react with silver nitrate solution like this: CuCl2 (aq) + 2AgNO3 (aq) --> 2AgCl (s) + Cu(NO3)2 (aq) The...
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: SnCl2(aq)+2AgNO3(aq)→2AgCl (s)+SnNO32 (aq) The chemist adds 69.0mM silver nitrate solution to the sample...
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 cadmium chloride, which would react with silver nitrate solution like this: CdCl2 (aq) + 2AgNO3 (aq) → 2AgCl (s) + CdNO32 (aq) The chemist...
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 iron(II) chloride, which would react with silver nitrate solution like this: FeCl2(aa) + 2 AgNO3(aa) -2 AgCl(s) Fe(NO3),(aq) The chemist adds 56.0 mM...
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 Iron(II) chloride, which would react with silver nitrate solution like this: FeCl(aq) + 2 AgNO3(aq) + 2 AgCl(s) + Fe(NO), (0) The chemist...
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 sample of groundwater known to be contaminated with nickel(II) chloride, which would react with silver nitrate solution like this: (aq) (aq) (s) (aq) The chemist adds M silver nitrate solution to the sample...
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 copper(II) chloride, which would react with silver nitrate solution like this: CuC2 2AgNO3(aq)-2 AgCl(s) + Cu(NO3(aq) The chemist adds 58.0 mM silver nitrate...
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)+3AgNO3(aq) -> 3AgCl(s)+Fe(NO3)3(aq) The chemist adds 34.0mM silver nitrate solution to the sample...
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 Iron(III) chloride, which would react with silver nitrate solution like this: FeCl3(aq) + 3 AgNO3(aq) — 3 AgCl(s) + Fe(NO3),(aa) The chemist adds...