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 cadmium chloride, which would react with silvernitrate solution like this:2 AgCl(s) + Cd(NO),(aq)CdCl2(aq) + 2 AgNO3(aq) 2 AgCl(s) + Cd(The chemist adds 24.0 mM silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs theprecipitate. He finds he has collected 5.5 mg of silver chloride.Calculate the concentration of cadmium chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits.mgLG

Step 1:The balanced equation for this reaction is: CdCl2(aq) + 2AgNO3(aq) → 2AgCl(s) + Cd(NO3) From…

Answered: One way the U.S. Environmental…

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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A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out 214.mg of oxalic acid H2C2O4 , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250.mL of distilled water. The student then titrates the oxalic acid solution with his sodium hydroxide solution. When the titration reaches the equivalence point, the student finds he has used 91.8mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution. Be sure your answer has the correct number of significant digits.
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Iron reacts with HCl solution to give H2 gas and Fe2+ ions. Suppose that 3.7 g of iron are to be dissolved in 2.0 M HCl. What is the minimum volume (in mL) of the acid solution required to react with all of the iron?
The traditional method of analysis for the amount of chloride ion present in a sample is to dissolve the sample in water and then slowly to add a solution of silver nitrate. Silver chloride is very insoluble in water, and by adding silver nitrate, it is possible effectively to remove all chloride ion from the sample. Ag+(aq) + Cl-(aq) → AgCl(s) Suppose a 1.515 g sample is known to contain 27.5% chloride ion by mass. What mass of silver nitrate must be used to completely precipitate the chloride ion from the sample?
Determine the copper 2 chloride in the original sample
Fe(II) can be precipitated from a slightly basic aqueous solution by bubbling oxygen through the solution, which converts Fe(II) to insoluble Fe(III): $$4Fe(OH)+(aq)+4OH−(aq)+O2(g)+2H2O(l)4Fe(OH)3(s) How many grams of O2 are consumed to precipitate all of the iron in 75.0 mL of 0.0350 M Fe(II)?
A solution of 655 mL of 0.852 M CO(NH2)2 is mixed with a solution of 432 mL of 0.487 M CO(NH2)2. It is then evaporated on a hotplate to a volume of 825 mL. What is the molarity of CO(NH2)2 in this final solution? [Be aware that evaporation only changes the amount of water, not the amount of CO(NH2)2, because the boiling point of CO(NH2)2 is nearly 200 °C, too high to evaporate out of the solution to a significant extent].
In the laboratory you are given the task of separating Ag+ and Co2+ ions in aqueous solution.For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No Y or N Reagent Formula of Precipitate if YES 1. fill in the blank 1 NaOH 2. fill in the blank 3 Na2CO3 3. fill in the blank 5 NaI
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP.What volume of a 0.370 M barium hydroxide solution is needed to exactly neutralize 4.24 grams of KHP ?
Consider the following reaction H2S (g) + FeS(s) + CO2(g) →FeS2(s) + HCO2H(aq) If 2.00 g of each reactant is each dissolved in 250.0 mL of water and all the solutions are mixed together. The final volume was measured to be 750.0 mL. a)How many grams of CO2 left unreacted? b) What is the concentration of HCO2H in this solution?
The chloride ion concentration in a solution may be determined by the precipitation of silver chloride. Ag+ (aq) + Cl(aq) →AgCl(s) A student finds that 19.45 mL of 0.6740 M silver nitrate is needed to precipitate all of the chloride ion in a 25.00-ml sample of an unknown. What is the molarity of the chloride ion in the student's unknown? M
A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out 360. mg of oxalic acid (H,C,O), a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250. mL of distilled water. The student then titrates the oxalic acid solution with his sodium hydroxide solution. When the titration reaches the equivalence point, the student finds he has used 97.4 mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution. Round your answer to 3 significant digits. M

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