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**Unformatted text preview: **Q# Question Text 6) Data Entry - No Scoring In the standardization of the sodium EDTA solution using the solid calcium carbonate primary standard, we must examine each of three acceptable trials. Enter the precise mass in GRAMS of the dry primary standard, calcium carbonate, used for each of 3 acceptable trials in the standardization titration. Your mass precision should be reported to a thousandth of a gram. Your Answer: 0.0890 No Points Possible Your Answer: 0.0930 No Points Possible Your Answer: 0.0910 No Points Possible 7) Data Entry - No Scoring In the standardization of the sodium EDTA solution using the solid calcium carbonate primary standard, your titration volumes of the sodium EDTA solution should be approximately 20 - 30 mL. For each of the 3 acceptable trials used in the titration of your calcium carbonate samples, enter the precise volume in milliliters of EDTA solution (e.g. 20.34 mL). Be sure to enter your volumes in the corresponding order that you entered your masses of calcium carbonate previously. For instance, the mass of calcium carbonate you entered for entry #1 below should correspond to the volume of EDTA solution that you enter for entry #1 here. Your Answer: 21.90 No Points Possible Your Answer: 27.70 No Points Possible Your Answer: 28.70 No Points Possible 8) Scoring Scheme: 3-3-2-1 Using the volumes of sodium EDTA solution you just entered and the corresponding calcium carbonate masses entered earlier, calculate the molarity of the sodium EDTA solution for each trial. ...

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