1. Some of the cyclohexane solvent vaporized during the temperature vs. time measurements. How will this loss of solvent affect its freezing point determination? Explain.
2. The digital thermometer is miscalibrated by +0.15 degrees Celcius over its entire range. If the same thermometer is used, will the reported moles of solute in the solution be too high, too low, or unaffected? Explain.
3. Some of the solid solute adheres to the side of the test tube during the freezing point determination of the solution. As a result of the oversight, will the reported molar mass of the solute be too high, too low, or unaffected? Explain.
4. Some of the cyclohexane solvent vaporized during the temperature vs. time measurement. How will loss of solvent affect the freezing point determination of the solution? Explain.
5. The solute dissociates slightly in the solvent. How will the slight dissociation affect the reported molar mass of the solute…too high, too low, or unaffected? Explain.
6. Interpretation of the data plots consistently reports that the freezing points of three solutions are too low. As a result of this “misreading of the data”, will the reported molar mass of the solute be too high, too low, or unaffected? Explain.
2. The digital thermometer is miscalibrated by +0.15 degrees Celcius over its entire range. If the same thermometer is used, will the reported moles of solute in the solution be too high, too low, or unaffected? Explain.
3. Some of the solid solute adheres to the side of the test tube during the freezing point determination of the solution. As a result of the oversight, will the reported molar mass of the solute be too high, too low, or unaffected? Explain.
4. Some of the cyclohexane solvent vaporized during the temperature vs. time measurement. How will loss of solvent affect the freezing point determination of the solution? Explain.
5. The solute dissociates slightly in the solvent. How will the slight dissociation affect the reported molar mass of the solute…too high, too low, or unaffected? Explain.
6. Interpretation of the data plots consistently reports that the freezing points of three solutions are too low. As a result of this “misreading of the data”, will the reported molar mass of the solute be too high, too low, or unaffected? Explain.
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None of these questions can be done without knowing what the lab was and seeing the data.
These should be really easy to answer if you did the lab. Ask your TA if you need help or go to office hours.
These should be really easy to answer if you did the lab. Ask your TA if you need help or go to office hours.