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Briefly describe the technique for packing a capillary melting point-tube
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- Filter paper is usually a poor material on which to powder a solid sample before introducing it into a capillary melting-point tube because small particles of paper may end up in the tube along with the sample. Why is this undesirable? and how might the presence of paper in the sample make the melting-point determination difficultA student placed about 1 cm of freshly recrystallized loosely packed solid into a melting-point capillary tube. The student noted that the solid melted 30 degrees lower than expected and the solid seemed to jump/separate in the tube as the temperature increased in the melting point apparatus. When the student measured the melting point the following day with less solid that was more tightly packed, the melting point was at the literature value. Explain what all went wrong with the student's first sample1. What is the limitation of the sublimation laboratory technique? 2. When can sublination be applied as a process of separation?
- May you Graph of temperature versus fraction number for the distilled liquid and show the extrapolation of the liquid’s boiling point. Fraction # Average Temperature 1 51 2 51.6 3 51.8 4 52 5 52 6 52 7 52 8 52How does the rate of temperature elevation influence the results of the melting point determination?Show in a detailed manner. 1. Draw and label the set-up for melting point determination using capillary tube. 2. Differentiate melting point and melting point range.
- . When checking the melting point of your impure sample, what temperature should you set as thestarting temperature (the SET temperature) and what should the ramp rate be?Relative amounts of fluid given off and reabsorbed by a model capillary, and what compensates for the difference between filtration and reabsorptionIf a non-polar mobile phase is used in a non-polar stationary phase, the polar components in a sample will elute first. True False