Titrimetric Analysis Classification Quiz
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Questions and Answers

What is the volume of 0.05 M EDTA needed to titrate the Ca in sample water that is 214.5 mg of hardness per liter?

  • 42.9 ml EDTA (correct)
  • 50.0 ml EDTA
  • 45.0 ml EDTA
  • 40.0 ml EDTA

    • What is the hardness of the water sample in mg CaCO3/L if the endpoint is reached when 50.00 mL of the sample is titrated with 12.00 mL of 5.00 x 10–3 M EDTA solution?

  • 214.5 mg/L (correct)
  • 100 mg/L
  • 300 mg/L
  • 200 mg/L

    • What is the molar concentration of an EDTA solution prepared by dissolving 3.853 g of purified and dried Na2H2Y.2H2O in sufficient water to give 1 L?

  • 0.0100 M EDTA
  • 0.01032 M EDTA (correct)
  • 0.0105 M EDTA
  • 0.0110 M EDTA

    • What is the percentage of excess moisture in the solute used to prepare the EDTA solution?

    <p>0.3 %</p> Signup and view all the answers

    What is the molecular weight of Na2H2Y.2H2O used to prepare the EDTA solution?

    <p>372 g/mol</p> Signup and view all the answers

    What is the purpose of titrating the Ca in sample water with EDTA solution?

    <p>To calculate the hardness of water</p> Signup and view all the answers

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