7. Would it work to take the melting point by using the same capillary tube for both trials? Solid melt(1) -solidify melt(2)-

Melting Point How will you collect data for this experiment? virtually Melting Point Measurement and Correction Approximate melting point of unknown compound: 85 – 96 °C Select an appropriate melting point standard with a melting point closest to the approximate melting point of your unknown compound. Choose the standard: A. 98 – 100 °C Saved A B. 160 – 162 °C C. 252 - 254 °C Measured absolute melting point of the standard: 96 - 98 °C Measured absolute melting point of the unknown compound: 90 - 94 °C Compare the reported and experimental melting points of the standard to determine if any corrections need be done for your unknown melting point. Correction (°C): 92 - 96 Saved

A student in New York City carried ou1t a boiling point determination for cyclohexane {b.p. 81• C) according to the procedure in this laboratory manual. Will this student's observed boiling point be the same as the value obtained by another student in Denver, Co'lorado.{Nicknamed the "Mile-High City" due to its high elevation)? Will it be lower or higher? Ex plain your conclusion.

4. A student received an impure sample of benzoic acid and reported the melting "mp=121.5 °C." The student reported the sample as pure since the melting too far off. What mistake was made that could have proven the sample's point as wasn't point impurity?