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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?
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?
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?
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?
What is the percentage of excess moisture in the solute used to prepare the EDTA solution?
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What is the molecular weight of Na2H2Y.2H2O used to prepare the EDTA solution?
What is the molecular weight of Na2H2Y.2H2O used to prepare the EDTA solution?
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What is the purpose of titrating the Ca in sample water with EDTA solution?
What is the purpose of titrating the Ca in sample water with EDTA solution?
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