2 the proper heating rate is 1 2 c per minute if this

2. The proper heating rate is 1-2 °C per minute. If this heating rate is exceeded, the solid
might melt too quickly to accurately measure the melting point range. The inability to
measure the melting point range would thereby hinder the process of identifying the
unknown compound.

3. A. If the compound turns from white to brown, then the compound has been overheated
and decomposed. In this situation, one must restart the experiment and ensure to maintain
a lower temperature to avoid overheating.
B. If the compound slowly disappears from the capillary tube before melting, then the
compound has sublimed from solid to gas. In this case, the capillary tube should be
sealed with a cap after more compound has been put into the tube.
4. A. Melting point of Ferrocene: 173-174 °C
Melting point of Acetylferrocene: 81-83 °C
B. Melting point of Adipic Acid: 151-154°C
Melting point of Citric Acid: 153-155 °C
5. In order to identify the unknown sample, the mixed melting point method must be used.
One will have to obtain a sample of adipic acid and citric acid, and mix each with some
unknown compound. Both mixtures would then be tested for the melting point, and the
compound with the least change in the melting point range from the literature will be the
unknown compound.
6. A. Begin by determining the number of drops in 1 ml of chloroform. Divide that number
by 0.8 to determine the number of drops needed to measure 0.8mL and use a pipet to
deliver the amount.
B. Use the density of methanol to calculate the volume needed for 1.2 grams of methanol.
Add that volume of methanol into a vial using a pipet.

C. Using a pipet, transfer 38 drops of methylene chloride into a graduated cylinder and
measure the volume. Then use the density of methylene chloride and the volume to
calculate for the mass of methylene chloride in 38 drops.