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2) The EPA has determined that the maximum safe level of nitrate ion in water is...
14. The EPA maximum safe limit for arsenic exposure is 50 ppb. If a 25 mL...
14. The EPA maximum safe limit for arsenic exposure is 50 ppb. If a 25 mL water sample was found to contain 50 ng of arsenic, would this water be deemed safe? Assume the density of water to be 1 g/mL.
A chemist samples a river's water to measure the amount of fertilizer runoff from the area...
A chemist samples a river's water to measure the amount of fertilizer runoff from the area farms. In a 0.0580 L sample, the chemist measures 2.00×102 μg of nitrate. Express the concentration of nitrate in parts per million (ppm) and parts per billion (ppb). Assume the density of the river water sample is 1.00 g/mL. concentration: ppm concentration: ppb
: The maximum safe level of bacteria per mL sample of water is 50. Suppose that...
: The maximum safe level of bacteria per mL sample of water is 50. Suppose that 60 samples of water are taken randomly from our water source. For these 60 observations, the average bacteria content is 51.7 bacteria per mL, with a standard deviation of 7 bacteria per mL. Is there reason to believe that the water is unsafe to drink?
The chemical trichloroethylene (TCE) is a colorless liquid found in very low concentration in drinking water....
The chemical trichloroethylene (TCE) is a colorless liquid found in very low concentration in drinking water. The EPA has set a maximum concentration of TCE in drinking water at 5 ppb. Consuming water on a regular basis that contains higher concentrations can lead to cancer. (a) What is the ppb concentration in a 200.0−L (200.0 kg) sample of water that contains 0.15 mg TCE?
The mole fraction of nickel(II) acetate, Ni(CH3COO)2, in an aqueous solution is 3.76x102 The percent by...
The mole fraction of nickel(II) acetate, Ni(CH3COO)2, in an aqueous solution is 3.76x102 The percent by mass of nickel(II) acetate in the solution is 0 Submit Answer An aqueous solution is 12.0% by mass ammonia NH3 The mole fraction of ammonia in the solution is Submit Answer Use the References to access important values if needed for this question. EPA regulations for harmful contaminants in drinking water set an upper limit of 4.00x103 mg/L for beryllium. Suppose that your water...
The concentration of Cu2+ ion in a sample of spring water is 5.3 ppm. What mass...
The concentration of Cu2+ ion in a sample of spring water is 5.3 ppm. What mass of Cu2+ ion is present in 6.5 L of this pring water, which has a density of 1.00 g/mL? O 2.6 g 0 0.068 g O 0.034 g O 0.34 g
12. (10 pts) Fluoride ions dissolved in drinking water can be detected using aluminum chloride and an indicator tha...
12. (10 pts) Fluoride ions dissolved in drinking water can be detected using aluminum chloride and an indicator that reacts with the released AB ions. The net ionic equation is shown below: AIF3+3 Cl AICls+ 6 F The normal fluoride concentration in New York State tap water is 1.00 mg/L. If a 0.150 L sample of normal tap water is titrated with a 3.00 x 104 M solution of AlCl3, what volume in mL of the AlCls solution is required...
One way the U.S. Environmental Protection Agency (EPA) tests tor chloride contaminants in water is by...
One way the U.S. Environmental Protection Agency (EPA) tests tor 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: The chemist adds 88.0 mM silver nitrate solution to the sample...
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 200. 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) ,(aq) The chemist adds 53.0...
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 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...
14. The EPA maximum safe limit for arsenic exposure is 50 ppb. If a 25 mL water sample was found to contain 50 ng of arsenic, would this water be deemed safe? Assume the density of water to be 1 g/mL.
The mole fraction of nickel(II) acetate, Ni(CH3COO)2, in an aqueous solution is 3.76x102 The percent by mass of nickel(II) acetate in the solution is 0 Submit Answer An aqueous solution is 12.0% by mass ammonia NH3 The mole fraction of ammonia in the solution is Submit Answer Use the References to access important values if needed for this question. EPA regulations for harmful contaminants in drinking water set an upper limit of 4.00x103 mg/L for beryllium. Suppose that your water...
The concentration of Cu2+ ion in a sample of spring water is 5.3 ppm. What mass of Cu2+ ion is present in 6.5 L of this pring water, which has a density of 1.00 g/mL? O 2.6 g 0 0.068 g O 0.034 g O 0.34 g
12. (10 pts) Fluoride ions dissolved in drinking water can be detected using aluminum chloride and an indicator that reacts with the released AB ions. The net ionic equation is shown below: AIF3+3 Cl AICls+ 6 F The normal fluoride concentration in New York State tap water is 1.00 mg/L. If a 0.150 L sample of normal tap water is titrated with a 3.00 x 104 M solution of AlCl3, what volume in mL of the AlCls solution is required...
One way the U.S. Environmental Protection Agency (EPA) tests tor 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: The chemist adds 88.0 mM 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: CuCl2(aq) 2 AgNO3(aq) 2 AgCl(s) + Cu(NO3) ,(aq) The chemist adds 53.0...
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